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

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

trough to 50 re s thr bke   nedsh le. therfore te dkgj jdjvhvfhv fe sjfv adxcc 60.

step-by-step explanation: