x is the 4th proportional to 12, 16 and 5; and 20, y, 15, 21 are in pr – McqOptions

MCQOPTIONS

1.	x is the 4th proportional to 12, 16 and 5; and 20, y, 15, 21 are in proportion. Then the value of (6x – y) is:
A.	9
B.	18
C.	13
D.	12
Answer» E.

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