Let estimated savings rate for Country X = 100X and similarly for country Y = 100Y

Now, over the same time period, the respective savings rate change as :

For Country X = 90X and for Country B = 125Y.

Need to find out the ratio (X/Y)x100.

From fact statement 1, 90X = 1.8; we get a value for X.But no value for Y. Insufficient.

From fact statement 2, 125Y = 3.75; we get a value for Y. But no value for X. Insufficient.

Both together, we get the value of the ratio(X/Y). Sufficient.

C.

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