P(h) = P(t) = 1/2
expand the binomial ... (h + t)^11
Pascal's triangle can help with the term coefficients
a. 11C7 (h^4 t^7)
b. 11C0 (h^11) + 11C1 (h^10 t) + 11C2 (h^9 t^2)
Find the probability of the following events in eleven tosses of a fair coin using binomial
probability?
a. Exactly 4 heads up
b. at least 9 heads up
1 answer