IBPS SO Prelims Exam Model Paper 1

Given:
A’s age = 70% of C
B’s age = 50% of C
A + B + C = 110 yrs.
Concept:
Use a simple concept of percentage and addition.
Calculation:
Let the age of C be X
A’s age is 70% of the age of C
⇒A’s age =

7X

10

B’s age is 50% of the age of C
⇒ B’s =

X

2

Now,
⇒

7X

10

+

X

2

+ X = 110 yrs
⇒

11X

5

= 110
⇒ X = 50 yrs.
⇒ Age of C = 50 years
A’s age =

7X

10

=

(7×75)

10

⇒Age of A =

11X

5

=

(7×50)

10

= 35 years
⇒ Age of B =

X

2

=

50

2

= 25 years
∴ Age of A and B is 35 years 25 years