Question

Present average age of 4 friends: ‘A’, ‘B’, ‘C’ and ‘D’ is 40 years. If their ages are in the arithmetic progression in the same order and ‘D’ is 4 years older than ‘B’, then find the sum of present ages of ‘A’ and ‘C’.

A 68 years
B 58 years
C 78 years
D 59 years
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