Question

The average age of a b c d 5 years ago was 45 years.By uncluding z the present averagen of all five is 49 years . What is the present age age of z

Answer 1

Answer:

Step-by-step explanation:

5 years ago

(a-5) + (b-5) + (c-5) + (d-5) / 4 = 45

so,  a+b+c+d = 200

at present

a+b+c+d+z / 5 = 49

putting value of a+b+c+d = 200

we get

z = 45 years

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