Question

A fair coin is tossed. How likely is it to land half heads, half tails if it is tossed 10 times? 20 times?

Answer 1

`"The probability is 0.246 if it is tossed 10 times and 0.176 if it"` `"is tossed 20 times."`

Explanation:

`C(10,5) (1/2)^10 = 0.246`
`and`
`C(20,10) (1/2)^20 = 0.176`
`with`
`C(n,k) = (n!)/((n-k)!k!)`