Question

find the range of height of any 10 student of your class

Answer 1

Hey there!

Let the height of students be:

121,122,123,124,125,126,127,128,129,130 [in cm]

Now,
Highest value = 130
Lowest value = 121 

Range = highest value - lowest value
            = 130 - 121
            = 9 cm ← (Ans)

Answer 2

Let the height of 10 students in cm are
121, 126,122,130, 123,124,128,120,127,125

highest value= 130
lowest value= 120
Range= highest - Lowest
Range= 130- 120= 10cm