The mean of 5 no. Is 27. If one no. Is excluded, their mean is 25. Find the excluded observation
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(a+b+c+d+e)÷5=27
a+b+c+d+e=27×5=135 ------1
e is removed
(a+b+c+d)÷4=25
a+b+c+d=25×4=100 -----2
1-2
e=35.
a+b+c+d+e=27×5=135 ------1
e is removed
(a+b+c+d)÷4=25
a+b+c+d=25×4=100 -----2
1-2
e=35.
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