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14 Jul 2009, 06:54
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During a 6-day local trade show, the least number of people registered in a single day was 80. Was the average number of people registered per day for the 6 days greater than 90?
1. For the 4 days with the greatest number of people registered, the average number registered per day was 100.
2. For the 3 days with the smallest number of people registered, the average number registered per day was 85.
1. For the 4 days with the greatest number of people registered, the average number registered per day was 100.
2. For the 3 days with the smallest number of people registered, the average number registered per day was 85.
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14 Jul 2009, 07:00
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Ans is A
Question is asking that did total number of people on all 6 days exceed 90*6 = 540?
stmt 1: Gives that on 4 maximum days, total number went to 400. Say the minimum number (80) were present on other 2 days. So total is 400+160 = 560. Now the total cannot be less than this, so this is sufficient.
Stmt 2: Gives that on 3 days minimum were 85*3 = 255. If take that on other 3 days atleast 80 people came each day, we get total as 255 + 240 = 495. We dont know what was the number on other 3 days, ie, how much was it more than 80. So insufficient.
Question is asking that did total number of people on all 6 days exceed 90*6 = 540?
stmt 1: Gives that on 4 maximum days, total number went to 400. Say the minimum number (80) were present on other 2 days. So total is 400+160 = 560. Now the total cannot be less than this, so this is sufficient.
Stmt 2: Gives that on 3 days minimum were 85*3 = 255. If take that on other 3 days atleast 80 people came each day, we get total as 255 + 240 = 495. We dont know what was the number on other 3 days, ie, how much was it more than 80. So insufficient.
. OA is A 
