Post a New Question


posted by .

Suppose an unfair coin comes up heads 52.2% of the time if it is flipped. If the coin is flipped 26 times, what is the probability that:

a) it comes up tails exactly 12 times?
b) it comes up heads more than 22 times?

  • probability -

    This is a binomial expansion with p=0.522, and q=1-p=0.478.
    We will calculate the terms of
    Using the notation
    (n,r)=n!/((n-r)!r!)=n choose r
    the binomial expansion can be expressed as

    P(12 tails)
    =P(14 heads)

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question