NDA2018MathematicsBasics of MathematicsActual
The average age of a combined group of men and women is 25 years. If the average age of the group of men is 26 years and the of the group of women is 21 years, then the percentage of men and women in the group is respectively
Options
- A20,80
- B40,60
- C60,40
- D80,20
Correct answer
D. 80,20
Step-by-step solution
Let No. of Man = M Let No. of Women = W aligned & 26 M +21 ~W =25( M + W ) & M =4 ~W & M : W =4: 1 aligned Percent of Men and Women =80 %, 20 %