question_answer 6)

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: (i) Highest and the lowest marks obtained by the students. (ii) Range of the marks obtained. (iii) Mean marks obtained by the group.

Answer:

                 (i) Highest marks obtained by the students\[=\text{95}\] Lowest marks obtained by the students \[=\text{39}\] (ii) Range of the marks obtained = Highest marks - Lowest marks \[=\text{95}-\text{39}=\text{56}\] (iii) Mean marks obtained by the group \[\text{=}\frac{\text{sum of all observations}}{\text{number o fobservations}}\] \[=\frac{85+76+90+85+39+48+56+95+81+75}{10}\] \[=\frac{730}{10}=73\]