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The average weight of 45 students in a class was calculated as 36 kg. It was later found that the weight of two students in the class was wrongly calculated. The actual weight of one of the boys in the class was 32 kg but it was calculated as 34 kg and the weight of another boy in the class was 45 kg, whereas it was calculated as 40 kg. What is the actual average weight of the 45 students in the class? (Rounded off to two digits after decimal)
- 36.16 kg
- Cannot be determined
- 36.07 kg
- None of these
- 35.84 kg
- None of these
- 228 Kg
- 242 Kg
- 122 Kg
- 232 Kg
- Rs 36.40
- Rs 24
- Rs 18
- Rs 18.20
- None of these
What are the fourth roots of ?
- 12
- 80
- 48
- 112
- 96
The average monthly income of A and B is Rs. 5000. The average monthly income of B and C is Rs. 6250 and the average monthly income of A and C is Rs. 5250. What is the monthly income of A?
5250
4250
4500
4000
5000
- None of these
- 49 or 94
- 25 or 52
- 23 or 32
- 4
- 8
- 16
- 32
- Rs. 400
- Rs. 500
- Rs. 600
- Rs. 300
- None of these
- 156 cm
- 157 cm
- 159.5 cm
- 159 cm
- 158 cm
- Rs. 18.95
- Rs. 16
- Rs. 20
- Rs. 25.71
- None of these
- 49
- 81
- 25
- 125
Joseph bought two varieties of rice, costing 5 cents per ounce and 6 cents per ounce each, and mixed them in some ratio. Then he sold the mixture at 7 cents per ounce, making a profit of 20 percent. What was the ratio of the mixture?
2:5
1:5
4:5
none
- 102.2
- 99.5
- 98.5
- 100.5
- None of these
The average of seven numbers is 28. If one number is excluded, the average becomes 26. What is the excluded number?
38
40
42
41
36
- 3 : 1
- 9 : 1
- 2 : 1
- 4 : 3
How do you find the geometric mean and harmonic mean
A. The average of first 10 numbers is 20
B. Each number is multiplied by 6.
- The data in both statements A and B together are necessary to answer the question.
- The data in statement A alone is sufficient to answer the question.
- The data in statement B alone is sufficient to answer the question
- The data either in statement A alone or in statement B alone is sufficient to answer the question
- The data given in both statements A and B together are not sufficient to answer the question.
The average of five numbers is 28. If one number is excluded, the average becomes 26. The excluded number is
30
40
25
35
36
- 12313
- 11712
- 12312
- 11713
- None of these
If are in arithmetic progression, then the straight line will pass through the point:
If the geometric mean and arithmetic mean of two numbers is 2 and 4 respectively. Then the harmonic mean of the two numbers is
1
8
16
2
A bag contains 50 P, 25 P and 10 P coins in the ratio 5: 9: 4, amounting to Rs. 206. Find the number of coins of each type respectively.
160, 200, 360
data insufficient
200, 360, 160
200, 160, 360
none
- 1026
- 1126
- 1226
- 1206
- 1306
- 57.5
- 50
- 52.5
- 55
The sum obtained when two positive integers are multiplied by the bigger number is 204, and their difference when multiplied by the smaller number is 35. What are the two numbers?
12, 5
13, 4
14, 3
24, 7
- Cannot be ascertained
- None of these
- An isosceles traingle
- An equilateral triangle
- A scalene triangle
Find the 8th term of the G.P. if the first term and common ratio are 4 and 6 respectively.
1119746
1119748
1119744
1119742
- None of these
- (ab)12c
- 1
- a2cb
- 22
- 24
- 18
- 12
- 16