Question

The mean of 10 numbers is 55. If one more number is included, their mean becomes 60. Find the included
number.​

Answer 1

$\huge\underline\pink{ÅnsWêR↓}$

Let the sum of 10 numbers be x

$\huge\bold\green{So,}$

10x =55⇒x=550

Let the excluded no. be y

So 9x−y =50

$\huge\bold\red{⇒}$x−y=450

$\huge\bold\red{⇒}$y=550−450

$\huge\bold\red{⇒}$y=100.

Answer 2

Answer:

the above answer is correct