Madhya Pradesh Police Exam Model Paper 4

Given :-
The average marks of Ravi in five subjects are 150
In mathematics 43 was misread as 23
Concept :-
Average = (Sum of total numbers)/Total number
Error's in marks = Original marks - Wrong marks
Calculation :-
⇒ 150 = (Sum of all subject)/5
⇒ Sum of all subject $=150\times 5$
⇒ Sum of all subject $=750$
Now,
⇒ Error's in marks $=43-23$
⇒ Error's in marks $=20$
Now, this 20 marks must be added in sum of marks
⇒ New sum of marks $=750+20=770$
⇒ New average $=\left(770/5\right)$
⇒ New average = 154
∴ Correct average = 154