Question

years
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:
Highest and the lowest marks obtained by the students.
Range of the marks obuined.
( Mean marks obtained by the group.​

Answer 1

Answer:

73

Step-by-step explanation:

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}\ =\ 73

10

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

​

 =  

10

730

​

 = 73