The mean age of combined group of men and women is 25 years. If the mean age of group of men is 26 and that of group of women is 21, then percentage of men and women in the group respectively is ?

Step-by-step explanation:

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 =  

no of people

sum of ages in the group

​  

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

what do u need to know

step-by-step explanation:

yes   because as the functions are graphed they eventually will intersect unless otherwise

step-by-step explanation: