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A teacher gave the same test to two classes: A and B. The

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pb_india
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A teacher gave the same test to two classes: A and B. The [#permalink] New post   09 May 2005, 05:50
A teacher gave the same test to two classes: A and B. The average scores for the two classes were 82, 74, respectively. The median scores for the two classes were 80, 78, respectively. Was the average score greater than the median scores for the two classes combined?
1) A and B have 37, 40 students, respectively.
2) Two classes have 77 students.



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Re: A teacher gave the same test to two classes: A and B. The [#permalink] New post   09 May 2005, 07:39
"A"


state 1: Avg for the class = (82*37 + 40*74 ) /77 ~ 77.84

I think median of a combined set will be gr8 than the lowest median and less than the highest median. So the median will be bet 78 and 80...so ans is NO...suff


state 2...no way to calculate the mean...insuff
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Re: A teacher gave the same test to two classes: A and B. The [#permalink] New post   09 May 2005, 18:59
banerjeea_98 wrote:
I think median of a combined set will be gr8 than the lowest median and less than the highest median. So the median will be bet 78 and 80...so ans is NO...suff


i also think in the say as above.
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Re: A teacher gave the same test to two classes: A and B. The [#permalink] New post   10 May 2005, 04:40
banerjeea_98 wrote:
"A"


state 1: Avg for the class = (82*37 + 40*74 ) /77 ~ 77.84

I think median of a combined set will be gr8 than the lowest median and less than the highest median. So the median will be bet 78 and 80...so ans is NO...suff


state 2...no way to calculate the mean...insuff


Good explanation baner...Thanks



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Re: A teacher gave the same test to two classes: A and B. The [#permalink]
10 May 2005, 04:40
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