16 vote
The sum of ages of Ram and his son is 48. If his uncle's age is also included the average 40. What is the age of Ram's uncle?
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The sum of ages of Ram and his son is 48. If his uncle's age is also included the average 40. What is the age of Ram's uncle?
1). 48
2). 50
3). 72
4). 34
2 answers
30 vote
72 is the correct answer as per the ssc answer key
21 vote
Solution :
Let us take Ram's age as 'x' ,Ram's son's age as 'y' and Ram's uncle's age as 'z'.
It is given that sum of Ram's and his son's age is 48. So,
x + y = 48 -----------> 1
It is also given that the average of the three ages is 40.So,
(x + y + z) / 3 = 40 --------> 2
Substituting 1 in 2 we get,
( 48 + z )/3 = 40
48 + z = 40 × 3
48 + z = 120
z = 120 - 48
z = 72
Hence, Ram's uncle's age is 72.
The correct option is 3).72
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