Discussion Forum



The following table gives the percentage of marks obtained by 7 students in 6 different subjects in an examination. Study the table and answer the questions based on it.

Note: The numbers in the brackets give the maximum marks in each subject.

1522021904_tabulation 12.JPG

1)

What are the average marks obtained by all the seven students in Physics ? (rounded off to two digits after decimal)


A) 77.26

B) 89.14

C) 91.37

D) 96.11

E) 103.21

Answer:

Option B

Explanation:

Total marks obtained in Physics by all the 7 students

= (90% of 120) + (80% of 120) + (70% of 120) + (80% of 120)

+ (85 % of 120) + (65 % of 120)+ (50 % of 120)

= (108 + 95 + 84 + 96 + 102 + 78 + 60) = 624.

.'. Average marks obtained by them in Physics = $\frac{624}{7}$

= 89.14