Question

A coin is slightly bent, and as a result the probability of a head is 0.52. Suppose that you toss the coin four times. Use the Binomial formula to find the probability of 3 or more heads

Answer 1

The probability of 4 heads is (0.52)^4. OK?

Answer 2

For the probability of 3 heads, start with
http://en.wikipedia.org/wiki/Binomial_distribution

Answer 3

It is 4 choose 3, which equals 4 times p^3 times (1-p). Add this to the P(4 heads).

Answer 4

Are you there @xkat