(q = 1 – p)
This P(x) is called the probability function of the binomial distribution A binomial distribution with n-Bernoulli trials and probability of success in each
trial as p, is denoted by B(n, p) Let  us now take up some examples Example 31 If a fair coin  is tossed 10 times, find the probability of
(i)
exactly six heads
(ii)
at least six heads
(iii)
at most six heads
Solution The repeated tosses of a coin are Bernoulli trials