Question

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)​

Answer 1

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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