kareem is 3 times as old as his son . after 10 years , the sum of their ages will be 76 years . find their present ages . Choose the most appropriate option
A) 13	B) 14	C) 15	D) 16	E) 17

Rationale: sol . let the present age of kareem ’ s son be x years . then , kareem ’ s age = 3 x years after 10 years , kareem ’ s age = 3 x + 10 years and kareem ’ s son ’ s age = x + 10 years ∴ ( 3 x + 10 ) + ( x + 10 ) = 76 = > 4 x = 56 = > x = 14 ∴ kareem ’ s present age = 3 x = 3 × 14 = 42 years kareem ’ s son ’ s age = x = 14 years . answer b
Answer: B