the mean of five numbers is 27. if one more number is included, then the mean is 26. find the included number.
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5
Answer:
Initially,
Mean of 8 no.=27
i.e. Total sum of 8 no=27×8=216
Now After including a number,
Total sum of 9 no=26×9=234
so, Included no=234-216=18
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Answered by
1
Answer:
Given Mean
= Sum of five numbers ÷ 5 Sum of the five no.
= 27 × 5 = 135.
Now, New mean = 26
26 = Sum of six numbers ÷ 6 Sum of the six no.
= 26 × 6 = 156
The included number = Sum of the six numbers – Sum of the five numbers
The included number = 156– 135
Therefore the included number = 21
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