The average of the marks obtained by 100 candidates in an examination – McqOptions

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1.	The average of the marks obtained by 100 candidates in an examination is 30. If the average of the passed candidates is 35 and that of the failed candidates is 10, then the number of candidates who have passed the examination is
A.	60
B.	70
C.	80
D.	90
Answer» D. 90

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