Question

a) The marks [out of 100] obtained by a group of students in a Maths test are 63,

80, 90, 73, 58, 41, 99, 83, 97.

i) Find the mean marks obtained by the group.

ii) Find the Range of the marks obtained.

iii) Find the median of this data.​

Answer 1

answer:

1. 77.625

2. 58

3. 81.5

explanation:

• mean = sum of all numbers/ total no.of numbers

                  = 41 + 58 + 73 + 80 + 83 + 90 + 97 + 99

                                               8

                 = 621/8 = 77.625

• range = maximum value of numbers/ minimum value of numbers

                  = 99 - 41 = 58

• 41+58+73+80+83+90+97+99

                80 + 83

                      2

             = 163/2

             = 81.5

Answer 2

Answer:

(i) 77. 625

(ii) 58

(iii)81.5