1000 families with 2 children were selected randomly, and the following data were recorded: Number of boys in a family                                                                0                                                                1                                                                2 Number of families:                                                                140                                                                560                                                                300 If a family is chosen at random, find the probability that it has (i) No boy (ii) one boy (iii) 2 boys (iv) at least one boy (v) at most one boy