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If the average of 16, 20 and n is between 18 and 21 inclusive, what is the greatest possible value of n?

1. A 18
2. B 21
3. C 27
4. D 54

The average of 7 numbers of 40. If 3 more numbers with an average of 21 are added to these numbers,what will be the average of the combined 10 numbers?

1. A 30.1
2. B 30.3
3. C 34.3
4. D 6.1

Average weight of 8 persons is 120 lb. One person leaves the group and a new person comes in and the new average is 122 lb. If the weight of the outgoing person is 110 lb, then what is the weight of the incoming person?

1. A 118
2. B 120
3. C 122
4. D 126

The cost of making x units is Y = 5x + 10, the average cost of making 10 units is--

1. A Tk. 5
2. B Tk.6
3. C Tk.7
4. D Tk.8

The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

1. A 10
2. B 12
3. C 15
4. D 8

If a3 - b3 = 513 and a - b = 3, then ab =?

1. A 34
2. B 45
3. C 54
4. D 55

What is the average of 0.36, 4.6, 0.64 and 2.4?

1. A 1
2. B 10
3. C 2
4. D 2.5

The average of 20, 70 and x is 40. If the average of 20, 70, x and y is 50, then y =?

1. A 100
2. B 60
3. C 70
4. D 80

If 8x + 8y = 64, what is the average of x and y?

1. A 0
2. B 1
3. C 16
4. D 4

On Monday a person mailed 8 packages weighting an average of 99/8 pounds and on Tuesday 4 packages weighting an average of 61/4 pounds. What was the average weight on pounds of all the packages the person mailed on both days?

1. A 109/4
2. B 111/4
3. C 27/13
4. D 40/13

A school had 100 students aged 20years on an average. At the of the year 20 students aged 22 years on an average left and 25 students of 18 years on an average joined the school. What is the average age of the present students of the school?

1. A 18
2. B 20
3. C 20.1
4. D 22

If Taka 4500 was invested in bonds of acorporation when the price per bond was Tk.9.00 and Taka 3000 was invested in bonds of another corporation when the price was Tk.10.00 per bond, What was the average price of bonds purchased?

1. A Tk.9.375
2. B Tk.9.40
3. C Tk.9.50
4. D Tk.9.625