Question

The average age of A and B is 20 years. If C were to replace A, the average would be 19 and if C
were to replace B, the average would be 21. What are the ages of A, B and C ?
(a) 22,18,20
(b) 18,22,20 (c) 22,20,18 (d) 18,20,22
​

Answer 1

Answer:

answer will be option a)22,18,20

Step-by-step explanation:

1stly,A+B/2=20

THEN,A+B=40

A=40-B

2NDLY,C+B/2=19

C+B=38

C=38-B

3RDLY,C+A/2=21

C+A=42

C=42-A

SO,38-B=42-A

OR,38-B=42-40+B

OR,-B-B=2-38

OR,-2B=-36

OR,B=-36/-2=18

A=40-18=22

C=38-18=20.

SO,A+B+C=22,18,20

PLZ MARK IT AS THE BRAINLIEST ANSWER PLZZ