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14 November, 20:59

Four students get 90s on a test, three get 70s, 2 get 60s and one gets an 80. what is the mean test score in this group?

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  1. 14 November, 22:22
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    The mean score will be given by:

    mean=

    mean=[90*4+70*3+2*60+80]/10

    =[360+210+120+80]/10

    =770/10

    =77

    the mean score is 77
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