# A fair coin is tossed three times and the events A, B, and C are defined as follows: A:{ At least one head is observed } B:{ At least two heads are observed } C:{ The number of heads observed

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1. ## math - probability

a) What is the probability of obtaining 2 Heads when a coin is tossed twice? b) What is the probability of obtaining 1 Head when a coin is tossed twice? Keep in mind, the coins are not tossed simultaneously.

2. ## Probability

Suppose that we have a box that contains two coins: A fair coin: P(H)=P(T)=0.5 . A two-headed coin: P(H)=1 . A coin is chosen at random from the box, i.e. either coin is chosen with probability 1/2 , and tossed twice. Conditioned on the identity of the

3. ## maths

a fair is tossed 200 times. find the probability of getting a head an odd number of times.

4. ## math

a student claims that if a fair coin is tossed and comes up heads 5 times in a row, then according to the law of averages the probability of tails on the next toss is greater than the probability of heads. What is your reply?

5. ## math

a fair die is tossed three times. Find the probability of getting a. Three 4s b. Three 5s c. Three 4s or three 5s

6. ## Math

Seth tossed a fair coin five times and got five heads. The probability that the next toss will be a tail is

7. ## math

In which scenario do you use geometric distribution to solve? -Find the number of times a tossed coin lands on tails in 10 trials. -Determine the number trials to do to have a tossed coin land on tails 8 times. -Determine the probability of tossed coin and

8. ## math

Coin A is tossed three times and coin B is tossed two times. What is the probability that more heads are tossed using coin A than coin B? THE ANSWER IS NOT 7/16

9. ## Math

A fair coin is tossed two times in succession. The set of equally likely outcomes is {HH, HT, TH, TT}. Find the probability of getting exactly one head. The probability of getting one head

10. ## math

Two fair dice, one blue and one red, are tossed, and the up face on each die is recorded. Define the following events: E : { The sum of the numbers is even } F : { The numbers are equal } Find the following probabilities: (a) P(E) = (b) P(F) = (c) P(E|F) =

11. ## algebra 2

A fair coin is tossed 4 times. Given that each of the first 3 tosses land tails up, what is the probability that all 4 tosses land tails up?

12. ## math

A fair coin is tossed 10 times. What is the probability of getting exactly 6 heads?

13. ## statistics

a coin is tossed 16 times. What is the standard deviation?

14. ## Conditional Probability

Please refer to the illustration at screenshotsfirefoxcom/jZoizoMJf8a3H0UZ/ds055uzetaobbcloudfrontnet to help answer the following question: Zeb's coin box contains 8 fair, standard coins (heads and tails) and 1 coin which has heads on both sides. He

15. ## Math (Ms. Sue)

A coin tossed. If heads appears, a spinner that can land on any number from 1 to 4 is spun. If tails appears, a second coin is tossed instead of spinning the spinner. What are the possible outcomes? H1 H2 H3 H4 H1 H2 H3 H1 H2 H3 H4 TH TT HH TH

16. ## common fraction

Sara tossed a fair coin five times, and Kaleb tossed a fair coin three times. There were five heads and three tails in the eight tosses. What is the probability that either Sara or Kaleb tossed exactly three heads? Express your answer as a common fraction.

17. ## probability

if a fair coin is tossed 4 times, what is the probability of getting heads the first 3 times, and tails the fourth itme?

18. ## Math

A biased coin is tossed 3 times. The probability that the coin will land on heads is 0.6 The probability that the coin will land on tails three times is less than 0.1 Is this correct? Show all your working.

19. ## Probability Theory

A fair coin is tossed three times and the events A, B, and C are defined as follows: A:{ At least one head is observed } B:{ At least two heads are observed } C:{ The number of heads observed is odd } Find the following probability by summing the

20. ## math

For a fair coin tossed three times, the eight possible simple events are HHH, HHT, HTH, THH, HTT, THT, TTH, TTT. Let X = number of tails. Find the probability distribution for X by filling in the table showing each possible value of X along with the

21. ## Statistics

A fair coin is tossed seven times. what is the probability of getting at least one tail?

22. ## math

Seth tossed a fair coin five times and got five heads. The probability that the next toss will be a tail is 1 0 2 5/6 3 1/6 4 1/2

23. ## Math

Would you be more likely to get at least 70% tails if you flip a fair coin 10 times or if you flip a fair coin 1000 times? A) You would be more likely to get at least 70% tails if you flip a fair coin 10 times than if you flip a fair coin 1000 times. B)

24. ## maths(pls help me)

A fair coin is tossed 400 times.Use the normal-curve approximation to find the probability of obtaining: a.Between 185 and 210 heads inclusive. b.Exactly 205 heads. c.less than 176 or more than 227 heads.

25. ## math

There are 5 cards numbered 1,2,3,4,5 in a bag. There is also a fair coin that is tossed what is the probility P(odds,Tails) I think it is 3/10 but not sure. Please explain this to me.

26. ## Math

A fair die is tossed and the number facing up is noted. If the probability of getting at least one ‘six’ is to exceed 0.9, how many times should the die be tossed.

27. ## math Study guide

I need help. I got all of these questions out of 50 wrong. 6-10 were not given. 1. Which of the following is an example of independent events? A-rolling a number cube and flipping a coin B-drawing marbles from a bag without replacement after each draw

28. ## Math Help

A fair coin is tossed 6 times. What is the probability of tossing at least 4 heads in a row?

29. ## math

if a fair coin is tossed 3 times, what is the probability of getting 3 tails? 1 1/3 2 3/3 3 3/8 4 1/8 is it 3/3.... coz all 3 could be tail also ....am i right?

30. ## Probability

Suppose that we have a box that contains two coins: A fair coin: P(H)=P(T)=0.5 . A two-headed coin: P(H)=1 . A coin is chosen at random from the box, i.e. either coin is chosen with probability 1/2 , and tossed twice. Conditioned on the identity of the

31. ## statistics

Five coins all balanced the same were tossed 150 times. Note that, while the coins are all balanced the same, they may or may not be fair coins. Since five coins were tossed, the possible number of heads for each toss could be zero through five. The

32. ## Math

A biased coin lands heads with probabilty 2/3. The coin is tossed 3 times a) Given that there was at least one head in the three tosses, what is the probability that there were at least two heads? b) use your answer in a) to find the probability that there

33. ## math

an unbiased coin is tossed six times. find the probability of the given event. the coin lands heads more than once.

34. ## math

an unbiased coin is tossed six times. find the probability of the given event - the coin lands heads more than once.

35. ## CALC

A biased coin whose chance of heads is 0.4 is tossed five times in a row. What is the probability that heads is tossed exactly 2 times? 20.2% 23.04% 36.8% 40.1% 45.6%

36. ## math

A coin is tossed. If a head appears, a spinner that can land on any of the numbers from 1 to 5 is spun. If a tail appears, the coin is tossed a second time instead of spinning the spinner. What are the possible outcomes? A.

37. ## Maths

e) A fair coin is tossed 6 times. What is the probability of getting exactly 2 heads? What is the mean of this experiment?

38. ## Statistics

Suppose a fair coin is tossed five times and let x be the number that turned up in those five times. **the mean and the standard deviation are respectively... a.) 0.5, 0.5 b.) 2.5, 0.5 c.) 2.5, 2.24 d.) 2.5, 1.12 **find P(x≥1) a.) 0.5 b.) 1.0 c.) 0.03

39. ## Data management

A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of

40. ## Data Management Help!

A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of

41. ## TEST TOMM. NEED HELP IMMEDIATELY. PROBABILITY

A fair coin is tossed ten times in a row. What is the probability that "heads" comes up at least eight times? I got an answer of 7/128, but I lost the paper with the work I showed. Can someone refresh my memory please?

42. ## Math

A coin is tossed three times. Determine which of the following outcomes describe mutually exclusive events. a) A: all tosses are heads , B: all tosses are tails b) A: at least one toss is a tail , B: at least one toss is a head c) For both a) and b) find

43. ## Math - PreCalc (12th Grade)

A fair coin is tossed 3 times in a row. If X is the number of heads counted, what is the mean of the probability distribution of X? A) 1.0 B) 1.5 C) 2.0 D) 2.5 E) 3.0

44. ## math

a fair coin is tossed in the air 4 times. if the coin lands heads up the first three tosses, what is the probability the coin will land heads up the fourth toss? I think it is 1/2 because the coin has 2 sides and 50% it will land on heads. My friend thinks

45. ## Maths

A fair coin is tossed 5 times. If X is the discrete variable the # of tails obtained, a) Draw the probability distribution . b) Find P (X

46. ## Math

Suppose we have two coins (coin A and coin B ), and we conduct two independent experiments in which a single coin is tossed four times. The outcomes of the experiments are presented in the table below. We use H to denote a Heads and T to denote a Tails.

47. ## Data Management

A random variable X is defined as the number of heads observed when a coin is tossed 4 times. Make a chart that shows the probability distribution for X. What is the expected value?

48. ## mathematical physics

An unbiased coin is tossed three times. If A is the event that a head appears on each of the first two tosses,B is the event that a tail occurs on the third toss and C is the event that exactly two tails appear in the three tosses,show that: i) Events A

49. ## math

Flag question Question text A fair coin is tossed 6 times. What is the probability to the nearest hundredth of obtaining at least one head? Select one: a. .08 b. .98 c. .50 d. .02

50. ## probability

Collin has a fair coin and a fair 10-sided number cube labeled 1-10. He performs this experiment 150 times to determine the experimental probability that heads is tossed and the number 2 is rolled. Which of the following is most likely to be the

51. ## probability

Collin has a fair coin and a fair 10-sided number cube labeled 1-10. He performs this experiment 150 times to determine the experimental probability that heads is tossed and the number 2 is rolled. Which of the following is most likely to be the

52. ## Math

Luis has a coin that is weighted so that the probability that Heads appears when it is tossed is 0.55. Suppose that the coin is tossed 3 times. What is the probability that all 3 tosses are Heads? please help ,e to solve this question . i dont'know if i

53. ## math

The chance of a head occurring in a certain biased coin is twice that of the tail occurring if the coin tossed 5 times. What is the probability of at most 1 tail occuring in the 5 tossed?

54. ## Math

A biased coin lands heads with probabilty 2/3. The coin is tossed 3 times a) Given that there was at least one head in the three tosses, what is the probability that there were at least two heads? b) use your answer in a) to find the probability that there

55. ## math

an unbiased coin is tossed 3 times. find the probability that the coin lands heads exactly once.

56. ## math

A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply?

57. ## math-probability

A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply?

58. ## Probability

A coin is tossed 1000 times,out of which we observe 560 heads,the question of interest is whether the coin is biased or not?

59. ## maths

A coin is biased so that a head is twicw as likely to occur as a tail. Suppose the coin is tossed three times. What is the probality of getting at exactly two tails

60. ## Math

Someone tossed a coin 80 times.The coin landed on heads 60 times. Is the experimental probability greater than or less than theoretical probability?

61. ## Statistic

QI) A coin is tossed and a die is rolled. Write the number of outcomes for the sequence of events (sample space S). Then, Draw a tree diagram for the sequence of events.

62. ## math

a fair coin is flipped 5 times the random variable is x is defined to be the number of heads that are observed identify the probability mass function of the random variable x. x P(x)

63. ## statistics

A fair die is tossed and the number facing up is noted. If the probability of getting at least one ‘six’ is to exceed 0.9, how many times should the die be tossed.

65. ## math \$\$

ty sooooo much another question (sorry about all these just trying to get this done and learn it before tom.) Jennie calculated the probabilities of various events involving a coin. What is the probability of a coin landing on heads at least twice when the

66. ## statistic 125

have three coins, two of which are fair and the other is a double header .suppose a coin is selected using random selection and tossed twice,one after the other.if i got two heads what is the probability that the coin that was selected was the double

67. ## ALGEBRA

Rodney fa fair coin and chooses a ter tiles A, E, I, O AND U. He performs this experiment 50 times to determine the experimental probability that heds is tossed and the letter A is chosen. Whitch o following is st likely to be the experimental probability

68. ## Statistics and Probability

One six-sided fair die is rolled, and one two-sided fair coin is tossed. If the coin turns up heads, then the number of spots showing on the die is the value (score) for that trial. If the coin is tails then twice the number of spots showing on the die is

69. ## Statics

You wish to test whether or not a coin is fair, so you toss it 400 times and obtain 220 heads. Test the null hypothesis that the coin is fair and balanced against the alternative that it is not fair and balanced. Use the 1% significance level. Be sure to

70. ## math

A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply? would this be the answer No

71. ## maths

Suppose there are 10 coins laid out in front of you. All of the coins are fair (i.e. have an equal chance of heads or tails) except one, which flips to heads every time. You draw one coin at random and flip it 5 times. If each of the 5 flips results in

72. ## statistics

Suppose that a coin is tossed 100 times. Let X be the number of times that it shows heads. Find the mean and standard deviation of X.

73. ## pre algebra Is it A,B,C or D?

Rodney flips a fair coin and chooses a letter tile A, E, I, O AND U. He performs this experiment 50 times to determine the experimental probability that heads is tossed and the letter A is chosen. Which of the following is most likely to be the

74. ## Probability

A pair of fair dice is tossed 3 times. Find the probability a seven appears 3 times.

75. ## Probability

if a coin is tossed twice, how many times would the head appear?

76. ## math

a fair die is tossed 180 times. Find the probability P that the face 6 will appear between 29 and 32 times inclusive.

77. ## math

a fair of die is tossed 180 times. Find the probability P that the face 6 will appear between 29 and 32 times inclusive?

78. ## Physics

A coin is tossed into the air with an initial speed of 8.00 m/s. In the absence of air resistance, how high does the coin go above its point of release It rises a distance h such that the potential energy gain (m g h) equals the initial kinetic energy loss

79. ## Easy Stats ?

You decide to flip a fair coin 100 times. What is the variance of this distribution? Also You decide to flip a fair coin 100 times. What is the standard deviation of this distribution?

80. ## MATH

Write down the following events as sets and also write the corresponding sample space.(1)an odd appears in a single toss of a fair die.(2)at least one head appears in two tosses of a fair coin.

81. ## Math

I don't want the answer. I just need the first couple of steps to help me solve. Please. A coin tossed. If heads appears, a spinner that can land on any number from 1 to 4 is spun. If tails appears, a second coin is tossed instead of spinning the spinner.

82. ## math

In a game, a player tosses a coin 4 times. If the player gets 3 or 4 heads, he/she wins. What is the theoretical probability of winning this game? I just need to know the outcomes. I don't know how to get them. Please and Thank you. Coin 1: 50% Heads Coin

83. ## Math 157

when a coin is tossed 4 times, 16 equally likely outcomes are possible, what are they

84. ## Math

A coin is tossed 13 times. How many different outcomes have at least 2 heads ?

85. ## Finite Math

A coin is tossed 10 times. What is the probability that at least 8 heads appear?

86. ## Probability

A coin is tossed 6 times. what is the probability of getting at least two heads?

87. ## math

Jasmine tossed a coin 20 times. It lands on heads 14 times and tails 6 times. What is the relative frequency of landing on tails?

88. ## algebra

A coin is tossed. If a head appears, a spinner that can land on any of the numbers from 1 to 4 is spun. If a tail appears, the coin is tossed a second time instead of spinning the spinner. What are the possible outcomes? 1) (T, H), (H, H), (H, 1), (H, 2),

89. ## Calculus

Steve thinks that he has a fair coin with equal probability of landing head or tails. He is ready to change his mind if in a long enough series of flips the coin will land on the same side. Steve decided that "long enough" means the probability of a fair

90. ## statistics

find the probability of by taking a coin tossed 50 times

91. ## Probability

A coin is tossed 3 times. What is the probability of getting 2 heads and 1 tail?

92. ## maths

A coin is tossed M+N times,M>N,then the chance of getting at least consecutive head is

93. ## maths

A coin is tossed M+N times,M>N,then the chance of getting at least consecutive head is

94. ## STATISTICS

A coin is tossed 4 times, the probability that all heads and all tails will appear is??

95. ## mathematics

a coin is tossed three times.What is the probability of getting: A.two heads and one tail B.at least one head.

96. ## statistic

A coin is tossed 6 times. Find the probability that all 6 tosses are tails.

97. ## statistics

A coin is biased so that the probability of obtaining a head is 2/3. The coin is tossed four times. Find the probability of obtaining exactly two heads.

98. ## Statistics

A coin is tossed 10 times. What is the probability that the third head will apear on the tenth toss?

99. ## STATISTICS

A coin is tossed 3 times and let X be the number of heads appearing. The probability that 1 head will appear iS?

100. ## Math.

You repeatedly toss a fair coin for 5 times. What is the probability that heads comes up at least 3 times before tails comes up twice?