Question:
The average of marks secured by 35 students is 72. If the marks secured by one student was written as 36 instead of 86 then find the correct average.
A73.4
B75.2
C73.8
D72.7
Answer:
A. 73.4
Explanation:
Average marks of 35 sutdents=72 sum of marks=72x35=2520 Correct sum=2520-36+86=2570 Correct average-2570/35=73.4