The average marks of 28 students in Mathematics was 50. 8 students left the school and then the average increased by 5. What is the average of marks obtained by the students who left the school?
- 45
- 37.5
- 42.5
- None
Explanation
Total marks of 28 students in Mathematics = 28 x 50 = 1400
New number of students = 28 - 8 = 20
New average of marks in Mathematics = 50 + 5 = 55
∴
Total marks of 20 students in Mathematics = 20 x 55 = 1100
∴
Total marks of 8 students who left the school = 1400 - 1100 = 300
∴
Average marks of these 8 students =
300/8 = 37.5
Related MCQs
- Rs. 8,000
- Rs. 9,000
- Rs. 10,000
- Rs. 12,000
اس سوال کو وضاحت کے ساتھ پڑھیں
- 5
- 6⅔
- 10
- 15
اس سوال کو وضاحت کے ساتھ پڑھیں
- 21
- 23
- 27
- 31
اس سوال کو وضاحت کے ساتھ پڑھیں
- 150 cm
- 150.24 cm
- 150.50 cm
- 151 cm
اس سوال کو وضاحت کے ساتھ پڑھیں
