Question

What is the probability of getting exactly 5 “heads” in 10 coin flips ?

Answer 1

There are $\dbinom{10}5=\dfrac{10!}{5!(10-5)!}=252$ ways of getting exactly 5 heads in 10 tosses. There are $2^{10}=1024$ possible outcomes. So the probability of getting exactly 5 heads is

$\dfrac{252}{1024}=\dfrac{63}{256}\approx24.61\%$

Answer 2

Answer:

the answer is 63/256 or b

Step-by-step explanation: