e) [2] If the random variable X: number of heads in 3 ips, set 11p the probability distribution in table form- . Each week a retail outlet accepts delivery of a certain item from 3 dif- ferent suppliers, A, B and C. All the items received are put into an empty bin. A supplies 50% of these items, while B and C each supply 25%. From past experience, it is known that 2% of the items supplied by A are defective, 2% of the items supplied by B are defective and 4% of the items supplied by C are defective. Suppose an item is chosen at random from the bin. 3)l3l What IS the probability that it is defective? b) [3] What IS the probability that it Came from s a