Question

can you help me to solve this

Answer 1

hope this helps any doubt please comment

Answer 2

mean = $\frac{sum of observations }{no. of observations}$

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18 = $\frac{sum of 5 numbers}{5}$

18 × 5 = sum of  numbers

90 = sum of numbers


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when one number was excluded, 

Mean = $\frac{sum of 5 numbers - excluded number}{4}$

16 = $\frac{90- excluded number}{4}$

16 × 4 = 90 - excluded number

64 = 90 - excluded number

64 - 90=   -excluded number


-26 = -excluded number

26 = excluded number




i hope this will help you


-by ABHAY