Question

the mean of five numbers is 27. if one more number is included, then the mean is 26. find the included number. ​

Answer 1

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

Have a great day dear ✌️......

Answer 2

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