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17 Jun 2026, 05:17
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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:
55%
(hard)
Question Stats:
72% (03:12) correct
28%
(03:45)
wrong
based on 60
sessions
History
Date
Time
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Not Attempted Yet
Janine sells each of frames that cost her $25 per unit to make either through an online retailer for $28 or at a local market for $36. Last year, \(\frac{3}{4}\) of her frames sold online. This year, she will sell 15% more frames than last year, \(\frac{3}{4}\) of them at the local market. What will be the percent increase in her profit from selling frames?
A. 80%
B. 95%
C. 107%
D. 125%
E. 195%
A. 80%
B. 95%
C. 107%
D. 125%
E. 195%
17 Jun 2026, 19:58
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Let last year's sales be 100 frames.
Last year:
75 × 3 + 25 × 11
= 225 + 275
= $500
This year:
86.25 × 11 + 28.75 × 3
= 948.75 + 86.25
= $1,035
Percent increase in profit:
(1035 − 500) / 500 × 100
= 535 / 500 × 100
= 107%
Answer: C (107%)
Last year:
- 75 frames sold online, profit = $28 − $25 = $3 each
- 25 frames sold at the local market, profit = $36 − $25 = $11 each
75 × 3 + 25 × 11
= 225 + 275
= $500
This year:
- She sells 15% more frames → 115 frames
- 3/4 sold at the local market = 86.25 frames
- 1/4 sold online = 28.75 frames
86.25 × 11 + 28.75 × 3
= 948.75 + 86.25
= $1,035
Percent increase in profit:
(1035 − 500) / 500 × 100
= 535 / 500 × 100
= 107%
Answer: C (107%)
17 Jun 2026, 22:46
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What about thinking in terms of weighted averages?
BongBideshini
Joined: 25 May 2021
Last visit: 05 Sep 2026
Posts: 390
Own Kudos:
Given Kudos: 137
Location: India
Concentration: Entrepreneurship, Marketing
Schools: HBS '27 Stanford '27 Wharton '27 Sloan '27
GPA: 3.8
WE:Engineering (Government)
18 Jun 2026, 05:40
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Using only weighted averages:
Last Year
0.75(3)+0.25(11)
=2.25+2.75
=5
So last year's average profit per frame = 5.
This Year
0.75(11)+0.25(3)
=8.25+0.75
=9
So this year's average profit per frame = 9.
She sells 15% more frames this year.
Therefore, total profit changes by:
(9*1.15 - 5) /5
=1.07
Hence, the percent increase is 107%
Ans C
Last Year
- 3/4 online → profit =3
- locally 1/4 → profit = 11
0.75(3)+0.25(11)
=2.25+2.75
=5
So last year's average profit per frame = 5.
This Year
- 3/4 sold locally → profit = 11
- 1/4 sold online → profit = 3
0.75(11)+0.25(3)
=8.25+0.75
=9
So this year's average profit per frame = 9.
She sells 15% more frames this year.
Therefore, total profit changes by:
(9*1.15 - 5) /5
=1.07
Hence, the percent increase is 107%
Ans C
