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The mean marks of 20 students in Physics is 45. If each student was given additional 10 marks, the mean marks of 20 students will be:
The mean marks of 20 students in Physics is 45. If each student was given additional 10 marks, the mean marks of 20 students will be:
A
45.5
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B
50.5
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C
55
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D
52.5
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Solution
The correct option is C 55
Mean increases by 10.
55
Mean increases by 10.
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