A group of 20 values has a mean of 85 and a median of 80. A different group of 30 values has a mean of 75 and a median of 72. (a

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问题 A group of 20 values has a mean of 85 and a median of 80. A different group of 30 values has a mean of 75 and a median of 72.
(a)What is the mean of the 50 values?
(b)What is the median of the 50 values?

选项

答案(a)mean = 79 (b)The median cannot be determined from the information given.

解析

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本试题收录于： GRE QUANTITATIVE题库GRE分类

GRE QUANTITATIVE

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A group of 20 values has a mean of 85 and a median of 80. A different group of 30 values has a mean of 75 and a median of 72. (a

GRE QUANTITATIVE

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Rabbitsarequietanimals,()theyareabletomake20differentsounds.

Expertssuggestusingadifferentpasswordforeverywebsiteyouvisit,andchangingthepasswordeveryfewmonths.Ittakestro

Hehasbeencalledthe"missinglink."Half-man,half-beast.Heissupposedtoliveinthehighestmountainintheworld-

Hehasbeencalledthe"missinglink."Half-man,half-beast.Heissupposedtoliveinthehighestmountainintheworld-

Hehasbeencalledthe"missinglink."Half-man,half-beast.Heissupposedtoliveinthehighestmountainintheworld-

Whatyou’realwaysheard?We’reeatingtoomuchsalt.TheaverageAmericangetsabout3.4gramsofsodiumeveryday,farmoreth

Steve:Wouldyoulikeanythingtodrink?IhaveSpriteandorangejuice.Bob:______

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Thedailytemperatures,indegreesFahrenheit,for10daysinMaywere61,62,65,65,65,68,74,74,75,and77.(a)Findthem

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