2. The sales promoters at a shop observed that 30% of the customers who visit the shop will buy a pair of shoes. The probability that a customer who buys a pair of
shoes will buy a pair of socks is 0.6. However, the probability that a customer will
buy a pair of socks only is 0.2. Find the probability that a customer who visit the
shop will buy
a.
A pair of shoes and a pair of socks.
b.
A pair of shoes or a pair of socks.
A pair of socks but not pair of shoes.