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09 Aug 2017, 23:34
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
91% (01:12) correct
9%
(01:03)
wrong
based on 91
sessions
History
Date
Time
Result
Not Attempted Yet
A certain bakery sells only cupcakes and brownies, and charges $5 for each cupcake and $4 for each brownie. If Jeremy spent $34 purchasing 8 items at the bakery, how many brownies did he purchase?
A. 2
B. 3
C. 4
D. 5
E. 6
A. 2
B. 3
C. 4
D. 5
E. 6
09 Aug 2017, 23:39
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Bunuel
Let no of cupcakes purchased be \(c\) and no of brownies purchased be \(b\)
As per the question
\(5c + 4b =34\) --------------(1) &
\(c + b = 8\) ------------------(2)
Solving equation 1 & 2 we get
\(b = 6\)
Option E
10 Aug 2017, 14:22
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Bunuel
We even do not have to solve equation here if we do not want to).
I prefer to solve equtions usually, but in this cas used a different approach.
n - number of cupcakes.
k - number of brownies.
So 5n+4k=34 -------> n must be even.
n+k=8
n k
0 not integer
2 6
4 not integer
6 1
8 not positive
So it is only 2 and 6. So option E.
