Q: The average of 15 numbers is 45. The average of first 6 numbers is 42 and Average of last 6 numbers is 43. 7th number is twice than 8th number, but 5 more than 9th. What is the average of 7th and 9th number?
A.
65.5
B.
64
C.
53.2
D.
65
Correct Answer:
Option A -
Explanations:
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