Correct Answer - Option 3 : 63
Total number of students
|
Number of students in Mathematics
|
Number of students in English
|
Number of students in Chemistry
|
Number of students in Computer
|
Number of students in Physics
|
300
|
45 (3/20) × 300
|
45
|
60 (45 + 15)
|
84 (60 + 24)
|
66 [300 – (45 + 45 + 60 + 84 )]
|
Required average = (84 + 60 + 45)/3
⇒ 63