Question

What is the average of 7,8,9,21

Answer 1

Answer:

$7 + 8 + 9 + 21 \div 4 \\ \\ 45 \div 4 \\ \\ 11.25$

Answer 2

Answer:

7+8+ 9+21=45÷4 (total no.of digits or numbers)so the average is 11.25