The mean of 5 numbers is 27 . if one number is excluded , their mean is 25.
Find the excluded number?
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1
Answer:
2 is the excluded number.
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2
Mean of 5 no.s is 27
a+b+c+d+e/5 =27
a+b+c+d+e = 27*5
a+b+c+d+e=135 ————————- 1
a+b+c+d = 25*4
a+b+c+d = 100 ————————- 2
Substitute 2 in 1
Then, 100+e=135
e=135-100
e=35
Hence the excluded number is 35
a+b+c+d+e/5 =27
a+b+c+d+e = 27*5
a+b+c+d+e=135 ————————- 1
a+b+c+d = 25*4
a+b+c+d = 100 ————————- 2
Substitute 2 in 1
Then, 100+e=135
e=135-100
e=35
Hence the excluded number is 35
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