Question

The mean of 7 numbers is 27. If one more number is included, the mean comes to be 28. Find the new number.

Answer 1

Mean =27

No.of observations=7

Therefore, sum of all numbers =27x7

=189

Let the new number be x.

So,189+x/8= New Mean.

189+x/8=28

189+x=28x8

189+x=224

therefore x=224-189

x=35.

Hope its help u

Answer 2

Answer:

35

Step-by-step explanation:

Mean =27

No.of observations=7

Therefore, sum of all numbers =27x7

=189

Let the new number be x.

So,189+x/8= New Mean.

189+x/8=28

189+x=28x8

189+x=224

therefore x=224-189

x=35.