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10 Mar 2026, 19:00
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B
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:
63% (02:21) correct
37%
(03:16)
wrong
based on 67
sessions
History
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Not Attempted Yet
Flax seeds of two different qualities - $1 per pound and $5 per pound -were mixed and sold. The retailer sold 120 pounds of flax seeds and earned a profit of $0.5 per pound. If he earned 25% profit on his investment, what was the quantity he used of flax seeds costing $5 per pound?
A. 20
B. 30
C. 40
D. 80
E. 90
A. 20
B. 30
C. 40
D. 80
E. 90
10 Mar 2026, 23:10
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let "a" be $1 flax seed and "b" be the $5 flax seed.
Then a+b=120....................(1)
Total sold at 0.5 profit per pound, so total profit = 120x0.5 = $ 60
Cost price = a+5b.
Given profit % is 25, so we get 60/(a+5b) = 25/100
a+5b = 240..................(2)
from two equations above, b=30 pounds.
Then a+b=120....................(1)
Total sold at 0.5 profit per pound, so total profit = 120x0.5 = $ 60
Cost price = a+5b.
Given profit % is 25, so we get 60/(a+5b) = 25/100
a+5b = 240..................(2)
from two equations above, b=30 pounds.
10 Mar 2026, 23:36
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Firstly,
Profit = 0.5*120 = 60 = 1.25x [Here x is the SP]
x=240 from here
So he sold 120 pounds for 240 thus SP = 2
So he is mixing 1 dollar and 5 dollars in a way to get 2 dollar
Using allegation we get ratio as 3:1
So amount of 5 dollar mixture = 1/4*120 = 30
Answer: Option B
Profit = 0.5*120 = 60 = 1.25x [Here x is the SP]
x=240 from here
So he sold 120 pounds for 240 thus SP = 2
So he is mixing 1 dollar and 5 dollars in a way to get 2 dollar
Using allegation we get ratio as 3:1
So amount of 5 dollar mixture = 1/4*120 = 30
Answer: Option B
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