The average age of four boys A, B, C and D is 5 years
and the average age of A, B, D, E is 6 years. C is 8 years
old. The age of E is (in years)
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Answer:
E=12 years
Step-by-step explanation:
Average of A,B,C,D = 5 years
=>(A+B+C+D)/4 =5
=> A+B+C+D = 20
They given C= 8 years
Therefore,
A+B+8+D = 20
=> A+B+D = 12 equation 1
Next,
The average of A,B,D,E is 6 years
=>(A+B+D+E)/4 = 6
=> A+B+D+E = 24
=> 12 + E = 24 From equation 1
=> E = 12 years.
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