Question

Ques 7 : 5 year ago the average age of p,q and r was 25 years and 7 years ago, the average age of q and r was 20 years. What is p's present age ? (a) 34 years (b) 36 years (c) 40 years (d) 24 years

Answer 1

Answer:

36

Step-by-step explanation:

let present age p,q,r

5 year ago be

p-5,q-5,r-5

average

(p-5+q-5+r-5)/3=25

p+q+r-15=75

p+q+r=90-------1

similarly

7 year

(q-7+r-7)/2=20

q+r-14=40

q+r=54-----2

sub equ 1-2

p=36