Question

3. The mean age of 100 persons is 30 years. If the mean age of the group of men is 32 years and that of
the group of women is 27 years, find the number of men and women.
A. 60 and 40
B. 65 and 35
O C. 50 and 50
O D. 7​

Answer 1

Answer:

Answer is 40

please mark as brilliant

Answer 2

Step-by-step explanation:

ANSWER

Let total no. of people in the group be 100 and out of them x are men

i.e no of women = 100−x.

Mean age = sum of ages in the group

/no of people

Total sum = sum of ages of men + sum of ages of women

⇒100×25=x×26+(100−x)×21

⇒x=80

Hence, the percentage of men and women in the group is 80,20 respectively