Average

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The average of the first 100 positive integers is....
100
no
51
no
50.5
yes
49.5
no
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Out of 10 teachers of a school, one teacher retires and in his place, a new teacher of age 25 years joins. As a result, average age of teachers is reduced by 3 years. The age of the retired teacher is….
50 years
no
58 years
no
60 years
no
55 years
yes
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