Question

We toss 3 coins 100,000 times. How many times do we expect to see "Exactly 1 Head" appearing?

Answer 1

When 3 fair coins are tossed, the probability of exactly one head appearing is found from:
$P(1\ head)=3C1\times(\frac{1}{2})^{3}=\frac{3}{8}$
Therefore in 100,000 trials we would expect to see exactly one head
$100,000\times\frac{3}{8}=37,500\ times$

Answer 2

You will see it only once