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Real Valued Functions

What is the p...

Question

What is the present age of the son?
Statements :
I. Five years ago, father was twice as old as the son.
II. Now father is 18 years older than the son.
III. The age of father and mother taken together is 30 years more than the son.

A

Only [ and III are sufficient

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B

Only II and III are sufficient

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C

Only I and II are sufficient

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D

All of I , II and III are not sufficient

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Solution

The correct option is B Only I and II are sufficient
$L e t t h e p r e s e n t a g e s b e f a n d s . f - 5 = 2 (s - 5) f = s + 18 s = 23 f = 41 O n l y 1 a n d 2 a r e r e q u i r e d .$

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Q. What is the present age of son ?
Statements:
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II. Now father is 18 years older than his son.
III. The age of father and mother taken together is 30 years more than the son.

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