10
1
4
3
2
Number of girls in
a family
300
400
700
350
250
Number of
families
13
a. Compute the probability of a family having 4 girls.
7
i.
ii.
9
11
20
iv.
111.
20
20
20
b. Compute the probability of a family having 3 girls.
i.
ii.
7
7
9
iii.
iv. None of these
40
40
20
13
11
e. Compute the probability of a family having atleast 1 girl.
i.
ii.
17
19
iv.
111.
20
20
20
20
1
d. Compute the probability of a family having 2 girls.
i.
ii.
iv.
10
6
8
iv.
3
2. Compute the probability of a family having no girls.
i.
ii.
iii.
11
20
5
20
20
14
Answers
Given : data related to ratio between male and female children in families.
2000 families with 4 children
Number of girls in a Number of families
family
4 700
3 350
2 250
1 400
0 300
To Find : the probability of a family having 4 girls
9/20
7/20
11/20
13/20
probability of a family having 3 girls.
probability of a family having atleast 1 girl.
probability of a family having 2 girls.
probability of a family having no girls.
Solution:
Number of girls in a Number of families
family
4 700
3 350
2 250
1 400
0 300
Total 2000
probability of a family having 4 girls = 700/2000
= 7/20
= 0.35
probability of a family having 4 girls = 7/20
probability of a family having 3 girls. = 350/2000 = 35/200
= 7/40
having atleast 1 girl. = 2000 - No girls = 2000 - 300 = 1700
probability of a family having atleast 1 girl. = 1700/2000 = 17/20
probability of a family having 2 girls. = 250/2000 = 1/8
probability of a family having no girls. = 300/2000
= 3/20
Learn More:
A pair of fair dice is thrown independently four times. The probability ...
brainly.in/question/21757712
A pair of dice is thrown together till a sum of 4 or 8 is obtained. The ...
brainly.in/question/14777415
Step-by-step explanation:
Compute the probability of a family having 3 girls.
7/40
9/40
7/20
None of these