Question

sameer got 100 marks in 5 subject in an examination. His average mark is?​

Answer 1

Total marks got = 100

Total no. of subjects = 5

Hence,
average marks
$= \frac{100}{5} \\ \\ = \frac{20 \times 5}{5} \\ \\ = \frac{20 \times \cancel{5} \: {}^{1} }{ \cancel{5} \: _1} \\ \\ = \frac{20 \times 1}{1} \\ \\ = \bf \: \: 20$