Question

the marks (out of 100) obtained by a group of students in a science test are 85,76,90,85,39,48,56,95,81 and 75. find the (a) highest and the the lowest marks obtained by the students (b) range of the marks obtained. (c) mean marks obtained by the group​

Answer 1

Answer:

Solution:

Marks obtained by a group of students in a science test can be arranged in ascending order as follows-

39, 48, 56, 75, 76, 81, 85, 90, 95

i) Highest marks = 95

Lowest marks = 39

ii) Range = 95-39 = 56

iii) Mean marks = \frac{85+76+90\ +\ 85\ +39\ +\ 48\ +\ 56\ +\ 95\ +\ 81\ +\ 75}{10}\ =\ \frac{730}{10}\ =\ 731085+76+90 + 85 +39 + 48 + 56 + 95 + 81 + 75 = 10730 = 73