In a class of 75 students, 44% are boys and the remaining are girls. The…
2019
In a class of 75 students, 44% are boys and the remaining are girls. The average marks of boys is 66 and that of girls is 72. What is the average marks of the whole class?
Answer: C. 69.36 — Total students = 75 Boys = 44% of 75 = 33 Girls = 75 − 33 = 42 Total marks of boys = 33 × 66 = 2178 Total marks of girls = 42 × 72 = 3024 Total marks = 2178 +…
- A.
70.24
- B.
68.56
- C.
69.36
- D.
68.82
Attempted by 87 students.
Show answer & explanation
Correct answer: C
Total students = 75 Boys = 44% of 75 = 33 Girls = 75 − 33 = 42 Total marks of boys = 33 × 66 = 2178 Total marks of girls = 42 × 72 = 3024 Total marks = 2178 + 3024 = 5202 Average marks of whole class = 5202 ÷ 75 = 69.36
Loading lesson…