Mathematics
Medium
Question
The average of 11 numbers is 10.9. If the average of first six is 10.5 and that of the last six is 11.4 the sixth number is_____________?
A
11
B
11.3
C
11.4
D
11.5
✓ Official correct answer
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A
11
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B
11.3
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C
11.4
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D
11.5
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