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 have a high average life span?
- Brand M
- Brand J
- both a and b
- None of these
Hint:
We have to find average i.e. mean.
The correct answer is: Brand J
The average life span of Brand M=
![space space space fraction numerator 100 plus 200 plus 150 plus 120 plus 140 plus 100 over denominator 6 end fraction
equals 270 over 6
equals 135](data:image/png;base64,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)
The average life span of Brand J=
![space space space space space fraction numerator 120 plus 180 plus 190 plus 140 plus 130 plus 110 over denominator 6 end fraction
equals 290 over 6
equals 145](data:image/png;base64,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)
Brand J have high average life span.
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