B= 1 is the difference between the mean and the median score on this exam.
To begin,
The remaining 30% of students received 95 points.
Assume 20 students are there.
Given,
2 students = 70 points.
5 students = 80 points.
4 students = 85 points
3 students = 90 points
6 students = 95 points
Because the 10th and 11th terms are both 85, the median is 85.
The mean is,
(70 × 2 + 85 × 5 + 85 × 4 + 90 × 3 + 95 × 6) ÷ 20
= 1720 ÷ 20
= 86
As a result, B = 1 for the difference between the mean and median.
Learn more about the mean and median at
https://brainly.com/question/2046711?referrer=searchResults
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