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March 26, 2017

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The probability of getting 2 heads and 1 tail when three coins are tossed is 3 in 8. Find the odds of not getting 2 heads and 1 tail.

ANSWER: 5:8?

Three Coins are tossed. Find the probability that exactly 2 coins show heads if the first coin shows heads.?

ANSWERS: Could it be 1/4?

  • Advanced Math - ,

    The first answer is correct.

    For the second, once you have the first head there are four possibilities for the other two coins:

    HH
    TT
    TH
    HT

    They must show one head for there to be two heads. What proportion do you find?

    I hope this helps. Thanks for asking.

  • Advanced Math - ,

    5:8

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