Question

A fair coin is flipped 4 times, what is the probability that exactly 3 heads appear?

35 points!!!

Answer 1

probability for one exact prediction in 4 coin flips would be 1 in 16 :-

(1/2)^4 = 16 possibilities

and since theres 4 possible ways for 3 heads and a tail to come in 4 tosses, hhht, hhth, hthh, thhh we can multiply by 4

(1/16)*4 = 1/4

Answer 2

1/4

Explanation:

`\binom{4}{3}(1/2)^4=(1)/(4)`