Question

1500 families with 2 children were selected randomly, and the following data were
did not hit a boundary.
2.
recorded:
0
Number of girls in a family
1
2
211
Number of families
475
814
​

Answer 1

Answer:

Number of families having 2 girls =475

Total families =475+814+211=1500     

P(2 girls) =Total families475

=1500475=6019

(ii) P(1 girl)=1500814=750407

(iii) P(No girl) =1500211

Sum of all these probabilities 

=6019+750407+1500211

=1500475+814+211

=15001500=1

Sum of these probabilities =1

bye