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18 Jul 2018, 00:19
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
85% (01:41) correct
15%
(01:20)
wrong
based on 61
sessions
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Not Attempted Yet
All packets of cookies have same price, and all pastries also have the same price; in a coffee shop. Whats the price of 6 packets of cookies and 3 pastries?
(1) 12 pastries and 15 packets of cookies cost $33.
(2) Price of a packet of cookie is 1/3 less than the price of a pastry.
(1) 12 pastries and 15 packets of cookies cost $33.
(2) Price of a packet of cookie is 1/3 less than the price of a pastry.
24 Jul 2018, 09:47
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amanvermagmat
OA: C
Let the price of 1 packet of cookie be C , and price of 1 pastry be P
We have to find the value of 6C+3P
Statement 1 : 15C+12P=33
Dividing both sides by 3, we get
5C+4P=11
We are not able to calculate value of 6C+3P or value of both C and P individually
Statement 1 alone is not sufficient
Statement 2 : C=P/3
3C=P
We can reduce the question stem to what is value of 15C or 5P, but still need value of either C or P
Statement 2 alone is not sufficient
Combining Statement 1 and Statement 2, we have two equation and two variable
5C+4P=11 ...(1)
3C-P=0 ....(2)
These equations do not represent parallel or coincident line , so we will get unique value of C and P.
Hence combining Statement 1 and Statement 2 will give us the unique value of 6C+3P
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