Access and Discuss Multiple choice questions for various competitive Exams and Interviews.

11. The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is:
a. 17 kg
b. 20 kg
c. 26 kg
d. 31 kg
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Answer: (d).31 kg

12. The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
a. 47.55 kg
b. 48 kg
c. 48.55 kg
d. 49.25 kg
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Answer: (c).48.55 kg

13. A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:
a. 250
b. 276
c. 280
d. 285
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Answer: (d).285

14. If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:
a. 53.33
b. 54.68
c. 55
d. None of these
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Answer: (b).54.68

15. A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half (1/2). The number of pupils in the class is:
a. 10
b. 20
c. 40
d. 73
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Answer: (c).40

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