Chinmayi writes 10 numbers whose average is 84. Then she asks Aadya to erase one number so that the average becomes 85. What number should Aadya erase?
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Answer:
75
Step-by-step explanation:
Numbers Average Sum
10 84 10*84 = 840
now 1 number is erased and average 85
9 85 9*85 = 765
Erased number = 840 -765 = 75
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