Bunuel wrote:

A mixture is composed of ingredients A, B, C, and D. How much more (in grams) of ingredient A than ingredient D is in the mixture?

(1) The ingredients A, B, C, and D are in the ratio 10:5:4:2, respectively.

(2) The amount (in grams) of ingredient B is 4 more than that of ingredient C.

Ans: C

Stat 1) gave us the ratio but we do not know anything about the relation between them in terms of exact gms. (Not sufficient)

State 2) gave us the relation between B and C but the still we can't find what is asked because relation between A and D is not given. (Not Suff)

Together we know the relation between B and C and ration between B and C from here we can find exact gms of B and C and thus Relation between A, B,C,D is given we can find both A and D too. this can ans the question.

from stat 2 (B=4+C) and from Stat 1 (B/C= 5/4) so B= (5/4)C hence C = 16, B= 20 from here A= 40 and D = 8 and A-D = 32 Ans.

Ans: C

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