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Last Friday a certain shop sold 3/4 of the sweaters in its

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Last Friday a certain shop sold 3/4 of the sweaters in its  [#permalink]

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New post 04 Feb 2018, 03:17
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Last Friday a certain shop sold 3/4 of the sweaters in its inventory. Each sweater sold for $20. What was the total revenue last Friday from the sale of these sweaters?

(1) When the shop opened last Friday, there were 160 sweaters in its inventory.
(2) All but 40 sweaters in the shop’s inventory were sold last Friday.

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Re: Last Friday a certain shop sold 3/4 of the sweaters in its  [#permalink]

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New post 04 Feb 2018, 04:22
broall wrote:
Last Friday a certain shop sold 3/4 of the sweaters in its inventory. Each sweater sold for $20. What was the total revenue last Friday from the sale of these sweaters?

(1) When the shop opened last Friday, there were 160 sweaters in its inventory.
(2) All but 40 sweaters in the shop’s inventory were sold last Friday.


We require to know the number of sweater to answer these question.
(1) When the shop opened last Friday, there were 160 sweaters in its inventory.
Straight answer ...
\(\frac{3}{4}*20*160=2400\)
Sufficient

(2) All but 40 sweaters in the shop’s inventory were sold last Friday.[/quote]
This tells us that \(1-\frac{3}{4}\) of sweaters are 40..
So total = 40*4/1=160..
Ans same as above
Sufficient

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2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: Last Friday a certain shop sold 3/4 of the sweaters in its &nbs [#permalink] 04 Feb 2018, 04:22
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