Mathematics

Grade10

Easy

Question

# Answer the following with the help of the data given below:

There are two brands of light bulbs which are brand M and Brand J. Here are the life spans of both brands (in hrs):

Brand M : 100 , 200 , 150 ,120 , 140 , 100

Brand J : 120 , 180 , 190 , 140 , 130 , 110

Which of the brands show less variability?

- Brand J
- Brand M
- Both a and b
- None of the above

## The correct answer is: Brand J

### Variability=max value - min value

Variability of Brand M= 200-100=100

Variability of Brand J=190-110=80

Brand J shows less variability.

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