mean of 11 numbers is 50.if mean of first 6 numbers is 49 and last six numbers mean is 52.find the sixth number? Please gives all steps
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The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :
A) 10.5B) 11.5C) 12.5D) 13.5
Answer: B) 11.5
Explanation:
Middle numbers = [(10.5 x 6 + 11.4 x 6) - 10.9 x 11] = (131.4 - 119-9) = 11.5.
A) 10.5B) 11.5C) 12.5D) 13.5
Answer: B) 11.5
Explanation:
Middle numbers = [(10.5 x 6 + 11.4 x 6) - 10.9 x 11] = (131.4 - 119-9) = 11.5.
Anonymous:
answer is 56
I say like that
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