Friday, 6 November 2015

Quantitative Aptitude MCQs : Test 13


1) The average of 5 numbers is 306.4. the average of the first two numbers is 431 and the average of the last two numbers is 214.5. what is the third number?
(a) 108         (b) 52           (c) 321          (d) Cannot be determined    (e) None of these


2) Kamlesh bought 65 books for Rs. 1, 050 from one shop and 50 books Rs. 1, 020 from another. What is the average price he paid per book?
(a) 36.40    (b) 18.20    (c) 24         (d) 18        (e) None of these

3) the sum of five numbers is 290. The average of the first two numbers is 48.5 and the average of last two numbers is 53.5. what is the third number?
(a) 72           (b) 84           (c) 96           (d) 108         (e) None of these

4) The average weight of a group of 53 girls was calculated as 58 kg. It was later discovered that the weight of one of the girls was read as 65 kg. Whereas her actual weight was 45 kg. What is the actual average weight of the group of 53 girls? (rounded off to two digits after decimal)
(a) 58.62 kg   (b) 58.37 kg   (c) 57.37 kg   (d) 57.62 kg   (e) None of these

5) the average marks in science subject of a class of 20 students is 68. If he marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?
(a) 68.5        (b) 69           (c) 69.5         (d) 70           (e) 66

6) The average age family of five members  is 24. If the present age of youngest member is 8 years, then what was the average age of the family at the time of the birth of the youngest member?
(a) 20 years   (b) 16 years   (c) 12 years   (d) 18 years   (e) 21 years

7) the average of 5 numbers is 65. The average of the first two numbers last two numbers is 38. What is the third number?
(a) 63           (b) 87           (c) 99           (d) Cannot be determined    (e) None of these

8) the total marks obtained by a student in physics, chemistry and mathematics together is 120 more than the marks obtained by him chemistry. What are the average marks obtained by him in physics and mathematics together?
(a) 60           (b) 120         (c) 40           (d) Cannot be determined    (e) None of these

9) the average age of 80 boys in a class is 15  years. The average age of a group of 15 boys in the class is 16 years  and the average age of another 25 boys in the class is 14 years. What is the average age of the remaining in the class?
(a) 15.25 years        (b) 14 years   (c) 14.75 years
(d) Cannot be determined    (e) None of these

10) The average age of seven boys sitting in a row facing north is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the boy who is sitting in middle of the row?
(a) 28 years   (b) 29 years   (c) 24 years   (d) 31 years   (e) None of these

Answer key
1.e               2.d               3.e               4.d               5.b
6.b               7.b               8.a               9.a               10.b

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