in a survey of 500 families having two children each it was found that 212 families have one boy and one girl 183 families have both boys now if a family is selected at random what is the probability that the family selected has two girls. A.105/500. B. cannot calculate. C.395/500. D.317/500
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Answer:
(i) Number of families having 2 girls =475
Total families =475+814+211=1500
P(2 girls) =
Total families
475
=
1500
475
=
60
19
(ii) P(1 girl)=
1500
814
=
750
407
(iii) P(No girl) =
1500
211
Sum of all these probabilities
=
60
19
+
750
407
+
1500
211
=
1500
475+814+211
=
1500
1500
=1
Sum of these probabilities =1
Step-by-step explanation:
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