AVERAGE MCQ SET 3
1. The average of 15 results is 21 . The average of the first 7 of those is 21 and the average of the last 7 is 20 . What is the 8th result?
(a) 25
(b) 31
(c) 28
(d) 22
Answer: C
2. The average weight of 100 students is 34 kg . The average weight of first 49 students is 34 kg and of last 50 students is 32 kg .. What is the weight of the 50th student?
(a) 138 kg
(b) 134 kg
(c) 130 kg
(d) 136 kg
Answer: B
3. The average weight of A , B and C is 77 kg . If the average weight of A and B is 68 kg and that of B and C is 83 kg , then the weight (in kg) of B is:
(a) 71
(b) 74
(c) 67
(d) 73
Answer: A
4. The average weight of A , B and C is 65 kg . If the average weight of A and B is 63.5 kg , and the average weight of A and C is 67.5 kg . then the weight of A (in kg) is :
(a) 65
(b) 67
(c) 60
(d) 68
Answer: B
5. Of the five subjects , the average marks of Rakesh in first 3 subjects was 75 the average marks in the last 3 subjects was 82 . If his marks in the third subject was 66 , what was his average marks in all the 5 subjects?
(a) 76
(b) 84
(c) 80
(d) 81
Answer: D
6. In a Hindi test of 100 marks , 11 students got 78 marks , 7 students got 80 marks , 5 students got 82 marks and 2 students got 86 marks . What was the average marks in Hindi ?
(a) 84
(b) 80
(c) 82
(d) 86
Answer: B
7. In an examination of 7 papers of 100 marks each , there were 3 mathematics papers , 2 English papers and 2 Hindi papers . D gets average marks of 45 , 55 and 60 in mathematics . English and Hindi , respectively . What are the average marks per paper ?
(a) 56.5
(b) 52.1
(c) 55.6
(d) 54.1
ย Answer: B
8. In a college in B.Tech. first year there are three sections A , B and C . If number of students in section A , B and C are 95 , 209 and 171 respectively and the average marks of section A , B and C in an exam are 83 , 78 and 85 respectively . What is the average marks of first year ?
(a) 80.66
(b) 81.52
(c) 81.48
(d) 82.16
Answer: B
9. In an examination , the average score of a student was 67.6 . If he would have got 27 more marks in mathematics , 10 more marks in Computer Science , 18 more marks in History and retained the same marks in other subjects , then his average score would have been 72.6 . How many paper were there in the examination?
(a) 11
(b) 10
(c) 12
(d) 9
Answer: A
10. A person bought a few mangoes of Rs.36 , separately from all five mandis at the rate of Rs.1 , Rs.1.50 , Rs.1.80 , Rs.2 and Rs.2.25 per mangoes respectively .ย
Accordingly , what is the average price of each mangoes ?
(a) Rs.1.91
(b) Rs.2.00
(c) Rs.1.58
(d) Rs.1.80
Answer: C
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