The average age of x and y is 18 years. If z is equal to 9 years the average of x, y and z is -

The average age of x and y is 18 years. If z is equal to 9 years the a

1.	The average age of x and y is 18 years. If z is equal to 9 years the average of x, y and z is -
A.	24 years
B.	15 years
C.	18 years
D.	20 years
Answer» B. 15 years

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The average age of x and y is 18 years. If z is equal to 9 years the average of x, y and z is -

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