Probability

posted by .

1) What is the probability of tossing 6 coins and getting at least two tails?

2) Suppose you flip a penny, a nickel,a dime and a quarter. What is the probability of getting heads on the penny and nickel and dime and tails on the quarter?

Please show steps for the solutions.
Thank you.

  • Probability -

    p tails in 1 toss = .5
    binomial distribution
    p = .5
    number of trials , n , = 6
    number of successes = 2,3,4,5,6
    number of failures = 0,1
    so easier to work it backwards
    what is the probability of 0 or 1 heads
    p is still .5
    p(0 heads) = C(6,0) (.5^0)(.5)^6 = .0156
    p(1 heads) = C(6,1)(.5^1)(.5)^5 = 3*.03125 = .09375
    sum = about .11
    1 - .11 = .89

  • Probability -

    Suppose you flip a penny, a nickel,a dime and a quarter. What is the probability of getting heads on the penny and nickel and dime and tails on the quarter?
    -------------------
    independent experiments
    1/2*1/2*1/2*1/2

  • Probability -

    a dime rolled 5 times find the probability of getting 4 exactly 5 times

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. probability

    A box of 6 coins (penny, nickel, dime or quarter) worth $0.67 is shaken. What is the probability that a nickel is drawn first and then a quarter?
  2. Math

    A penny, a nickel and a dime and a quarter are tossed. What is the probability of obtaining at least three heads?
  3. Math: Probablity

    A penny, a nickel, and a dime are flipped at the same time. Each coin can come out either heads (H) or tails (T). a. What name is given to the act of flipping the coins?
  4. Probability

    * I have a question. The sentence below says, "A PENNY, a NICKEL, and a DIME are flipped....." Does this go in order?
  5. Probability

    Four Coins are tossed. Describe the sample space S, probability of getting more tails than heads and probability of getting at least two heads.
  6. Probability

    Four coins are tossed. What is the probability of getting more tails than heads and getting at least two heads?
  7. math

    The game involves tossing a penny and a dime along with rolling a die. to win the penny land heads up, the dime land tails up and roll a 6 on the die. what is the probability that he will win on the first play
  8. math

    John tosses a penny 10 times and finds that 2 of those times the penny comes up heads and 8 of those times the penny comes up tail. What should John conclude?
  9. Algebra, help please!!!

    A penny, nickel, dime, and a quarter are tossed. What is the probability of the event of obtaining at least three heads on the tosses?
  10. Math

    Darrin tosses a quarter and a penny 20 times. He gets heads on both coins twice. Compare the theoretical probability of getting heads on both coins with Darrin’s experimental probability of getting heads on both coins. Why might …

More Similar Questions