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) two boys (iv) at least one boy (v) at most one boy.

Explanation

Total number of outcomes=1000

1)`P(0B)=140/1000=7/50`

2)`P(1B)=560/1000=14/25`

3)`P(2B)=300/1000=3/10`.