Question

the class mark of 90- 130​

Answer 1

$here \\ upper \: limit = 130 \\ lower \: limit = 90 \\ \\ class \: mark = \frac{upper \: limit + lower \: limit}{2} \\ \\ \implies \: class \: mark = \frac{130 + 90}{2} \\ \\ \implies \: class \: mak = \frac{220}{2} \\ \\ \implies \: class \: mark = 110$