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The top and bottom of each bar indicate, respectively,
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09 May 2015, 10:19
09 May 2015, 10:19
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The top and bottom of each bar indicate, respectively, the highest and lowest daily number of shirts sold during the month. The heavy line across each bar indicates the average (arithmetic mean) number of shirts sold per day during the month.
What was the range in the daily number of shirts sold during March?
(A) 20
(B) 45
(C) 50
(D) 60
(E) 70
The average (arithmetic mean) number of shirts sold per day during February was approximately what percent greater than the average number sold during January?
(A) 10%
(B) 20%
(C) 30%
(D) 40%
(E) 70%
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Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: DI Set #8
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20 May 2015, 14:45
20 May 2015, 14:45
2
sandy wrote:
The top and bottom of each bar indicate, respectively, the highest and lowest daily number of shirts sold during the month. The heavy line across each bar indicates the average (arithmetic mean) number of shirts sold per day during the month.
What was the range in the daily number of shirts sold during March?
(A) 20
(B) 45
(C) 50
(D) 60
(E) 70
We can see that, in March, the LOWEST daily shirt sales was 20 and the GREATEST daily shirt sales was 70
So, the RANGE = 70 - 20
= 50
Answer:
Show: ::
C
Cheers,
Brent
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: DI Set #8
[#permalink]
20 May 2015, 14:49
20 May 2015, 14:49
1
sandy wrote:
The top and bottom of each bar indicate, respectively, the highest and lowest daily number of shirts sold during the month. The heavy line across each bar indicates the average (arithmetic mean) number of shirts sold per day during the month.
The average (arithmetic mean) number of shirts sold per day during February was approximately what percent greater than the average number sold during January?
(A) 10%
(B) 20%
(C) 30%
(D) 40%
(E) 70%
The solid bar denotes the AVERAGE daily shirts sales for that month.
In January, the average was about 25
In February, the average was about 35
Percent increase = 100(new - old)/old
So, percent increase = 100(35 - 25)/25
= 100(10)/25
= 40
Answer:
Show: ::
D
Cheers,
Brent
