Question

The average of 11 number is 10.9 .If the average of first six is 10.5 and that of the last six is 11.4 and sixth number is?

Answer 1

Step-by-step explanation:

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=>Sum of 11 numbers = 11×10.911×10.9 

=>Sum of first 6 numbers = 6×10.56×10.5 

Sum of last 6 numbers = 6×11.46×11.4 

=>Therefore, The middle number = 6×10.5+6×11.4−11×10.96×10.5+6×11.4−11×10.9

=> 63+68.4−119.963+68.4−119.9

= >131.4 - 119.9 = 11.5

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Answer 2

Step-by-step explanation:

heey buddy

hope it's useful