# Algebra 2

A coin is tossed three times. Find the probability of each event.
a) at least two tosses come up tails.
b) at least one toss comes up heads.

1. 👍 0
2. 👎 0
3. 👁 116
1. a) 2/3
b) 1/3

1. 👍 0
2. 👎 0
2. There are only 8 possible outcomes:
HHH, HTT, THT, TTH, HHT, HTH, THH, TTT

Of those, there are 4 with at least two tails
a) prob = 4/8 = 1/2

b) There are 7 with at least one H, (only TTT has no heads)
so prob = 7/8

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Math

A coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 3 times, what is the probability of getting 2 tails and 1 head? What do you mean by biased in probability?

asked by Jen on October 15, 2015
2. ### 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

asked by sajid on February 17, 2012
3. ### 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?

asked by Charles on January 31, 2010
4. ### Math

10. A coin is loaded so that the probability of heads is 0.55 and the probability of tails is 0.45, Suppose the coin is tossed twice and the results of tosses are independent. a.What is the probability of obtaining exactly two

asked by Renee on March 2, 2014
5. ### 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

asked by Anonymous on October 9, 2010
1. ### Statistics

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

asked by Maryan on November 17, 2010
2. ### Math

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

asked by Jaiby on September 10, 2018
3. ### 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

asked by Jessica on March 23, 2017
4. ### 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?

asked by kristy on May 10, 2011
5. ### Math

You flip a coin 20 times and get tails 15 times you flip the coin 80 more times.what do you expect to happen to the experimental probability of getting tails as you increase the number of trials a. The experimental probability

asked by ghost on May 25, 2017
6. ### math

A coin is tossed and then a die is rolled. Find the probability of getting a 5 on the die given that the coin landed tails up.

asked by allen on December 13, 2009