Question

The marks obtained by a group of students in a mathematics test are 85, 76, 85, 39,48, 56,95, 81 and 75. Find the range of the marks​

Answer 1

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73010

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First, we have to arrange the number of marks in ascending order.

Ascending order is,

39,48,56,75,76,81,85,85,90,95  

(i) Highest marks are 95 and lowest marks are 39.

(ii) Range = 95−39=56

(iii) Mean=39+48+56+75+76+81+85+85+90+9510=73010