The scores obtained by 3,500 examinees in an entrance examination for admission in a certain university are approximately normally distributed with a mean of 77% and a standard deviation of 7%. Find the probability and the number of students who obtained scores. a) 80 percent
b) 85 percent to 90 percent​

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answer

a) the midrange of the data set shown is 85.5

step by step explanation

let's find the midrange.

the midrange is nothing but add the greatest value and the least value, then divide it by 2.

here the greatest value = 99

the least value = 72

midrange = (99 + 72)/2

= 171/2

midrange = 85.5

you.

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