What is the probability that 15 tosses of a fair coin will show 8 tails? Round the answer to four decimals places as needed.
prob(tails) = 1/2
prob(not tails) = 1/2
prob(exactly 8 tails out of 15 tries) = C(15,8)(1/2)^8 (1/2)^7
= 6435 / 32768
= appr 0.1964