The average of 30 numbers is 15. The average of the first 18 numbers i – McqOptions

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1.	The average of 30 numbers is 15. The average of the first 18 numbers is 10 and that of the next 11 num-bers is 20. The last number is
A.	56
B.	52
C.	60
D.	50
Answer» E.

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