Ask Question
16 February, 17:33

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?

+5
Answers (1)
  1. 16 February, 21:08
    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?
Get 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 there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers