The total age of A and B is 12 years more than the total age of B and C. C is younger than A by:
11 years
13 years
10
12
Explanation:
Total age of A and B is 12 years more than total age of B and C.
Since B is common in both sides, we can rephrase the statement as
"age of A is 12 years more than age of C".
That is, C is 12 years younger than A.
Total age of A and B is 12 years more than total age of B and C.
Since B is common in both sides, we can rephrase the statement as
"age of A is 12 years more than age of C".
That is, C is 12 years younger than A.