X is three years younger than Y who is twice as old as Z. if the total of the ages of X, Y and Z be 22, then how old is Y?

12 years

14 years

8 years

10 years

Solution: Let Z's age be x. then, Y's age=2x years. And X's age=(2x-3). .'. (2x-3)+2x+x=22. ,==> x = 5. Hence, Y's age= 2*5=10 years.

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