tim415 wrote:

Julie opened a lemonade stand and sold lemonade in two different sizes, a 52-cent (12oz) and a 58-cent (16oz) size. How many 52-cent (12oz) lemonade drinks did Julie sell?

(1) Julie sold a total of 9 lemonades

(2) The total value of the lemonade drinks Julie sold was $4.92

Cost of 12 oz drink =52 cents, lets assumte total number sold are N

Cost of 16 oz drink =58 cents, lets assumte total number sold are M

Statement 1: N+M =9

So it could be that N=1, M=8 or that N=2, M=7 etc. Clearly not sufficient.

Statement 2: N*0.52 + M*0.58 = 4.92

Or to simplify it: N*52 + M*58 = 492

N*26 + M*29 = 246

M*29 = 246-N*26

This is true only for one value of M and N, when M=4 and N=5. (Assuming number of drinks to be only integers and hoping Julie's stand is not a unique stand that sells 0.732, 0.981 drinks

)

Hence sufficient to answer.

Ans B it is.

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