The average marks obtained by a group of 10 students were 20. One stud – McqOptions

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1.	The average marks obtained by a group of 10 students were 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.6. What were the average marks obtained by the student who left and the one who joined?
A.	16
B.	15
C.	13
D.	14
Answer» E.

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