[" 22.A bag contains "5" white,"7" red and "8" black balls.If four balls are drawn one "],[" by one with replacement,what is the probability that (i) none is white,"],[" (ii) all are white,(iii) at least one is white? "],[" 23.A policeman fires "6" bullets at a burglar.The probability that the burglar will "],[" be hit by a bullet is "0.6." What is the probability that the burglar is still unhurt? "]