Thousand families with two children were selected randomly and the following data was recorded

No, Of Boys No of Families

0 140

1 560

2 300 Qn.. If a family choosen at random find the probability that it has (a) At least 1 boy

(b) At most 2 boys

Question

Thousand families with two children were selected randomly and
the following data was recorded
No, Of Boys No of Families
0 140
1 560
2 300 Qn If a family choosen at random find the probability that
it has (a) At least 1 boy
(b) At most 2 boys

Ayush Jha · Accepted Answer

Total number of families = 1000

1>The families having atleast 1 boy = 560 +300

=860

So,

$P (a t l e a s t 1 b o y) = \frac{860}{1000} = \frac{43}{50}$

2>Families having at most 2 boys = 140+560+300

=1000

$P (a t m o s t 2 b o y) = \frac{1000}{1000} = 1$

Thousand families with two children were selected randomly and the following data was recorded No, Of Boys No of Families 0 140 1 560 2 300 Qn.. If a family choosen at random find the probability that it has (a) At least 1 boy (b) At most 2 boys

Thousand families with two children were selected randomly and the following data was recorded

No, Of Boys No of Families

0 140

1 560

2 300 Qn.. If a family choosen at random find the probability that it has (a) At least 1 boy

(b) At most 2 boys