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20 December, 22:08

The grades received by 200 students follow a normal distribution. Then mean of the grades is 70, and the standard deviation is 7 the number of students who received a grade greater than 70 is about blank and the number of students who got a grade higher than 84 is about

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  1. 20 December, 23:36
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    300/7-79., (84x7) = 763
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