If X:Y = Y:Z = 5 and Z = 2, what is the value of X?

A 3

B 4

C 4.5

D 3.5

Correct Answer: Option C

Here,

Y:Z = 1.5

or, Y/Z = 1.5

or, Y/2=1.5 [Z=2]

So, Y=1.5×2=3

Now, X:Y = 1.5

Or, X/Y = 3/2 [3/2=1.5]

Or, X/3=3/2 [Y=3]

Or, X=9/2=4.5