The probability that an archer scores a bullseye with any shot is 0.4. Find the probability that he scores 4 bullseyes in 8 shots. [2] 10% of a batch of lightbulbs are faulty. If a sample of 20 bulbs is taken, find the probability that it will contain 2 faulty bulbs. [2] A student buys a drink every day at the vending machine. The probability he buys a cola is 0.45. In a sample of 10 days, nd the probability that he buys cola on 6 of these days. [2]