The average marks obtained by 20 students is 45. The average of first – McqOptions

MCQOPTIONS

1.	The average marks obtained by 20 students is 45. The average of first ten is 50 and that of the last nine is 40. What are the marks obtained by the 11th student?
A.	30
B.	50
C.	40
D.	45
Answer» D. 45

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