3 In a supermarket the proportion of shoppers who buy washing powder is denoted by \(p .16\) shoppers are selected at random.
- Given that \(p = 0.35\), use tables to find the probability that the number of shoppers who buy washing powder is
(a) at least 8,
(b) between 4 and 9 inclusive. - Given instead that \(p = 0.38\), find the probability that the number of shoppers who buy washing powder is exactly 6 .