Latest Wipro Aptitude Question SOLUTION: The average age of A and B is 20 years. If C replace A the average would be 19 and if C replaces B the average would be 21. What are the ages of A, B and C? A. 22, 20, 18 B. 22, 18

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The average age of A and B is 20 years. If C replace A the average would be 19 and if C replaces B the average would be 21. What are the ages of A, B and C?
A. 22, 20, 18
B. 22, 18, 20
C. 18, 20, 22
D. 18, 22, 20
E. 22, 19, 20

Asked In Wipro (12 years ago)

Unsolved Read Solution (3)

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Read Solution (3) :

k sarath babu  (12 years ago)

A+B/2=20 A+B=40
B+C/2=19 B+C=38
C+A/2=21 C+A=42
BY SUBTRACTING A+B=40 AND B+C=38 WE GET A+B-B-C=40-38 A-C=2
BY ADDING A+C=42 AND A-C=2 WE GET 2A=44 A=22
A+C=42 C=42-22=20 C=20
A+B=40 B=40-22 B=18
A=22,B=18,C=20

Is this solution Helpfull? Yes (8) | No (3)  

A.Aparna  (8 years ago)

option B
A+B=2*20;
C+B=2*19;
A+C=2*21;
By solving the above equations we get the solution

Is this solution Helpfull? Yes | No (1)  

NAGAMALLA ARAVIND  (5 years ago)

A+B/2=20 A+B=40---------1
C+B/2=19 C+B=38----------2
C+A/2=21 C+A=42----------3
BY SUBSTRACTING 1&2 A+B=40 AND B+C=38 WE GET A+B-B-C=40-38
A-C=2
NOW SOLVING A-C=2 & A+C=42
2A=44
A=22
SUBSTITUTE A=22 IN A-C=2
C=22-2
C=20
SUBSTITUTE C=20 IN B+C=38
B=38-C
B=38-20
B=18

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