five years ago the average age of a b c and..., Average, General Mathematics

Question:Five years ago, the average age of A,B,C and D was `45` years .With E joing them now, the average of all the five is `49`.How old is E ?

A `25 yrs` 
B `40 yrs` 
C `45 yrs` 
D `64 yrs

/54

+ AnswerC

+ Explanation(A + B + C + D),five years ago

`= (45 xx 4)`

`= 180 years`

(A + B + C + D), now 

`= (180 + 5 xx 4) years`

`= 200 years`

 A + B + C + D + E, now 

`= (49 xx 5) years`

`= 245 years`

   :. E, now 

`= (245 - 200)`

`= 45 years`

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