Question

Find the probability of tossing 3 tails, then 5 heads, on the first 8 tosses of a fair coin.
A) 4
B) 0.007813
C) 0.125
D) 0.003906

Answer 1

That is 1 possibility out of many. The exact number is 0.00390625, or answer D.

Answer 2

Work:
(1/2)^2.

Answer 3

Or, more precisely, P(3 tails and 5 heads)=3.90625%