the mean of 5 numbers is 27 if one number is excluded their mean is 25 find the excluded observation
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n5 is 35 (usinq two equation as shown
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(n1+n2+n3+n4+n5)/5=27-----(I)
now, let n5 be excluded
=> (n1+n2+n3+n4)/4=25----(II)
=> By (I)&(II) ((27*5)-n5)=100
=> 135-n5=100
=> n5=35
now, let n5 be excluded
=> (n1+n2+n3+n4)/4=25----(II)
=> By (I)&(II) ((27*5)-n5)=100
=> 135-n5=100
=> n5=35
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