Average age of three friends a,b,and c was 20. Average age of a and b is 19 yrs . What is the age of c?
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Step-by-step explanation:
the age of c is 22 years.
Answered by
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Step-by-step explanation:
avarage age of a,b and c is = a+b+c/3
= a+b+c/3 = 20
= a+b+c = 60-------(1)
= avarage age of a and b is = a+b/2
= a+b/2 = 19
= a+b = 38------(2)
from eq. (1) and (2)
= a+b+c = 60
= 38 + c = 60
c = 22
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