If x is added to each of 12, 28, 21 and 45, the numbers so obtained, i – McqOptions

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1.	If x is added to each of 12, 28, 21 and 45, the numbers so obtained, in this order, are in proportion. What is the mean proportional between (x + 3) and (4x + 1)?
A.	15
B.	18
C.	12
D.	10
Answer» B. 18

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