The average age of a family of 5 is 32. If the average age of 3 of them is 40, then find the average age of the other 2 members of the family.

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Solution

The correct option is C 20
Sum of ages of all family members $= 5 \times 32 = 160$
Sum of ages of the three members $= 3 \times 40 = 120$
Average of the other two $= \frac{(160 - 120)}{2} = 20$

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The average age of a family of 5 is 32. If the average age of 3 of them is 40, then find the average age of the other 2 members of the family.

The correct option is C 20Sum of ages of all family members =5×32=160 Sum of ages of the three members =3×40=120 Average of the other two =(160−120)2=20

The correct option is C 20
Sum of ages of all family members $= 5 \times 32 = 160$
Sum of ages of the three members $= 3 \times 40 = 120$
Average of the other two $= \frac{(160 - 120)}{2} = 20$