Suppose we flip a coin 10 times. The probability that heads occurs exactly the same number of times as tails on the 10 flips is:
A)0.1667.
B)0.2461.
C)0.3125.
D)0.5.

Question

Quizplus · Accepted Answer

For a fair coin flipped 10 times, the number of ways to get exactly 5 heads (and therefore 5 tails) is given by the binomial coefficient C(10, 5). The total number of possible outcomes is 2^10. Therefore, the probability is C(10, 5) / 2^10 = 252 / 1024 = 0.2461.

Suppose We Flip a Coin 10 Times