Ask Question
5 March, 10:12

You flip a fair coin 7 times. What is the probability that the coin lands with the heads side up exactly 3 out of the 7 times?

+3
Answers (1)
  1. 5 March, 10:34
    0
    35/128 ≈ 0.2374

    Step-by-step explanation:

    The number of combinations of 7 things taken 3 at a time is ...

    7·6·5 / (3·2·1) = 7·5 = 35

    The number of sequences in which the coins can land is 2^7 = 128.

    Of those 128 sequences, 35 will have exactly 3 heads.

    The probability is 35/128.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “You flip a fair coin 7 times. What is the probability that the coin lands with the heads side up exactly 3 out of the 7 times? ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers