Average Part-01 (01-12) -Dr. R.S. Aggarwal

Описание: #mathhelpline #mathhelpline 00:00 Quantitative Aptitude for Competitive Examinations

by S. Chand and Dr. R.S. Aggarwal
07. Average Part-01 (01-12)

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Part-01 (01-12) -    • Average  Part-01 (01-12)  -Dr. R.S. Aggarwal  



Part-02 (13-30) -    • Average  Part-02 (13-30)  -Dr. R.S. Aggarwal  



Part-03 (31-45) -    • Average  Part-03 (31-45)  -Dr. R.S. Aggarwal  



Part-04 (46-60) -   • Average  Part-04 (46-60)  -Dr. R.S. Aggarwal  


Part-05 (61-75) -   • Average  Part-05 (61-75)  -Dr. R.S. Aggarwal  



Part-06 (76-90) -   • Average  Part-06 (76-90)  -Dr. R.S. Aggarwal  



Part-07 (91-105) -   • Average  Part-07 (91-105)  -Dr. R.S. Aggarwal  



Part-08 (106-120) -   • Average  Part-08 (106-120)  -Dr. R.S. Agga...  



Part-09 (121-165) -   • Average  Part-09 (121-135)  -Dr. R.S. Agga...  


0:26 1. The body weight of seven students of a class is recorded as 54 kg, 78 kg, 43 kg, 82 kg, 67 kg, 42 kg and 75 kg. What is the average body weight of all the seven students?
(a) 63 kg (b) 69 kg (c) 71 kg (d) 73 kg (e) None of these

1:20 2. Find the average of the following sets of scores:
385, 441, 876, 221, 536, 46, 291, 428
(a) 221 (b) 403 (c) 428 (d) 536 (e) None of these

2:03 3. The monthly incomes of five persons are 1132,1140, 1144, 1136 and 1148 taka respectively. What is their arithmetic mean?
(a) 1100 (b) 1120 (c) 1132 (d) 1140

2:57 4. Among five people with monthly income (in tk ) 15000, 26000, 16000, 19000 and 50000, how many will have income less than the mean income of five people?
(a) 1 (b) 2 (c) 3 (d) 4

4:03 5. The arithmetic mean of 15 numbers is 41.4. Then the sum of these numbers is
(a) 414 (b) 420 (c) 620 (d) 621

4:33 6. If 25a + 25b = 115, what is the average of a and b?
(a) 2.5 (b) 3.4 C) 4.5 e) None of these

5:28 7. The following table shows the number of working hours and the number of employees employed in a small scale industry.
No. of working hours 3-5 5-7 7-9 9-11 11-13 13-15
No. of employees 7 10 18 57 14 8
The average number of working hours of employee is
(a) 8.5 (b) 9.5 (c) 10.5 (d) None of these

7:04 8. If the arithmetic mean of 0, 5, 4, 3 is a, that of - 1,0, 5, 4, 3 is b and that of 5, 4, 3 is c, then relation between a, b and c is
(a) a = b = c (b) a : b:c =3:2:4 (c) 4a = 5b = c (d) a +b +C = 12

8:25 9. Kunal bought 65 books for Tk.1050 from one shop and 50 books for Tk.1020 from another. What is the average price he paid per book?
(a) Tk. 18 (b) Tk 18.20 (c) Tk.24 (d) Tk.36.40 (e) None of these

9:10 10. The average of the reciprocals of x and y is
(a)(x+y)/(x-y) (b) (x+y)/2xy (c) 2(x+y)/xy (d) 2xy/(x+y)

9:42 11. The average of two numbers is XY. If one number is X, the other is
(a) y/2 (b) Y (c) 2XY- X (d) X (Y-1)

10:04 12. There are five boxes in cargo hold. The weight of first box is 200 kg and the weight of the second box is 20% more than the weight of the third box, whose weight is 25% more than the first box's weight is 25% more than the first box’s weight. The fourth box at 350 kg is 30% lighter than the fifth box. The difference in the average weight of the four heaviest boxes the four lightest boxes is
(a) 37.5 kg (b) 51.5 kg (c) 75 kg (d) 112.5 kg