Question

The average marks per student in a class of 30 students were 45. on rechecking it was found that marks



had been entered wrongly in two cases. after correction these marks were increased by 24 and 34 in the



two cases. the correct average marks per student are

Answer 1

Answer:

Step-by-step explanation:

Total incorrect=45*30=1350

Correct total=1350+24+34=1408

Correct average=1408/30=46.93

Hope you understood.

Answer 2

$\Large{\textsf{\pink{\underline{ANSWER}}}}$

★The average marks per student in a class of 30 students were 45 when the counting was flawed.

★So total marks in that case was -

• 30 × 45
• 30 × 451350

★Suppose for student A and B marks had been entered wrongly as ′a′ and ′b′.

★After rechecking the marks were increased by 24 and 34.

★ So , now A has a+24 and B has b+34.

★ So total marks now is -

• 1350+24+34
• 1408.
• Then the correct average is 1408/30=46.93