The average age of four members of a family is $20$ years If the age of grandfather be included, the average age is increased by $9$ years. The age of grandfather is:

48

years

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52

years

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65

years

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72

years

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Solution

The correct option is C $65$ years
The Average Age of 4 family member is 20
If Grand Father is Include then Average age increase by 9 years
Grand Father Age will be : $20 + (5 \times 9)$
$= 20 + 45$
Grand Father Age $= 65$ years
Hence, option 'C' is correct.

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The average age of four members of a family is 20 years If the age of grandfather be included, the average age is increased by 9 years. The age of grandfather is:

The correct option is C 65 yearsThe Average Age of 4 family member is 20If Grand Father is Include then Average age increase by 9 yearsGrand Father Age will be : 20+(5×9)=20+45Grand Father Age =65 yearsHence, option 'C' is correct.

The average age of four members of a family is $20$ years If the age of grandfather be included, the average age is increased by $9$ years. The age of grandfather is:

The correct option is C $65$ years
The Average Age of 4 family member is 20
If Grand Father is Include then Average age increase by 9 years
Grand Father Age will be : $20 + (5 \times 9)$
$= 20 + 45$
Grand Father Age $= 65$ years
Hence, option 'C' is correct.