Question

the average off eleven number is 21 if 3 is added each given number what will be the new avarage​

Answer 1

1. average
2. $something \div 11 = 21 \\ = 21 \times 11 \\ = 231$
3. 3×{something}=231+3
4. something=234/3
5. =78
6. new average is 78

Answer 2

11(x+3)/11=21

11(x+3)=21*11

11(x+3)=231

x+3=231/11

x+3=21

x=21-3

x=18

The new average is 18