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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Given Kudos: 1053
GPA: 3.39
A shopper spends $25 to purchase floppy disks at 50¢ each. T
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07 Nov 2019, 22:40
07 Nov 2019, 22:40
1
Expert Reply
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Question Stats:
90% (01:33) correct
9% (03:56) wrong based on 11 sessions
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A shopper spends $25 to purchase floppy disks at 50¢ each. The next day, the disks go on sale for 30¢ each and the shopper spends $45 to purchase more disks. What was the average price per disk purchased?
(A) 25¢
(B) 30¢
(C) 35¢
(D) 40¢
(E) 45¢
(A) 25¢
(B) 30¢
(C) 35¢
(D) 40¢
(E) 45¢
Re: A shopper spends $25 to purchase floppy disks at 50¢ each. T
[#permalink]
08 Nov 2019, 04:03
08 Nov 2019, 04:03
1
Expert Reply
The shopper spent $25, or 2500¢, on the 50¢ disks, he purchased 2500/50 = 50 disks. On the second day, the shopper spent $45, or 4500¢, on the 30¢ disks, and thus he purchased 4500/30 = 150 disks.
Thus, the average price per disk is (2500 + 4500)/(50 + 150) = 7000/200 = 35 cents.
Thus, the average price per disk is (2500 + 4500)/(50 + 150) = 7000/200 = 35 cents.
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Re: A shopper spends $25 to purchase floppy disks at 50¢ each. T
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04 Aug 2022, 23:56
04 Aug 2022, 23:56
2
Theory
A shopper spends $25 to purchase floppy disks at 50¢ ($0.5) each
Total Price Paid on First Day = $25
Total Disks Purchased on First Day = Total Price Paid / Price of each disk = \(\frac{25}{0.5}\) = \(\frac{250}{5}\) = 50
The next day, the disks go on sale for 30¢($0.3) each and the shopper spends $45 to purchase more disks
Total Price Paid on Second Day = $45
Total Disks Purchased on Second Day = Total Price Paid / Price of each disk = \(\frac{45}{0.3}\) = \(\frac{450}{3}\) = 150
The average price per disk purchased
Average = Sum of all the Values / Total Number of Values = Total Price Paid in both the days / Total number of disks purchased = \(\frac{25 + 45}{ 50 + 150}\) = \(\frac{70}{200}\) = $0.35 = 35¢
So, Answer will be C.
Hope it helps!
Watch the following video to Learn the Basics of Statistics
- ➡ Average = Sum of all the Values / Total Number of Values
➡ Sum of All the values = Average * Total Number of Values
A shopper spends $25 to purchase floppy disks at 50¢ ($0.5) each
Total Price Paid on First Day = $25
Total Disks Purchased on First Day = Total Price Paid / Price of each disk = \(\frac{25}{0.5}\) = \(\frac{250}{5}\) = 50
The next day, the disks go on sale for 30¢($0.3) each and the shopper spends $45 to purchase more disks
Total Price Paid on Second Day = $45
Total Disks Purchased on Second Day = Total Price Paid / Price of each disk = \(\frac{45}{0.3}\) = \(\frac{450}{3}\) = 150
The average price per disk purchased
Average = Sum of all the Values / Total Number of Values = Total Price Paid in both the days / Total number of disks purchased = \(\frac{25 + 45}{ 50 + 150}\) = \(\frac{70}{200}\) = $0.35 = 35¢
So, Answer will be C.
Hope it helps!
Watch the following video to Learn the Basics of Statistics
