Let following marks were obtained by the students in a test: 81,72,90,90,86,85,92,70,71,83,89,95,85,79,62 The range of the marks is 9             (b)  17           (c)  27          (d)  33

Explanation

Observation are: `81,72,90,90,86,85,92,70,71,83,89,95,85,79,62.`
The minimum marks obtained are: `62` and Maximum marks obtained are: `95`

Thus, range = maximum marks − minimum marks `=95−62=33`