The average of 20 numbers is 80. The average of the first 10 numbers i – McqOptions

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1.	The average of 20 numbers is 80. The average of the first 10 numbers is 76.5 and next 7 numbers is 82. The 18th number is 3 more than the 19th number but 3 less than the 20th number. What is the average of 18th and 19th numbers?
A.	88.5
B.	85.5
C.	86
D.	85
Answer» C. 86

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