• Rs. 8500
• Rs. 5100
• Rs. 4800
• Rs. 6000

• 58.63
• 66.09
• 44.89
• 69.07

• 27
• 50
• 54
• 48

• 71
• 65
• 67
• 68

• 108
• 120
• 113
• 111

• 40
• 42
• 48
• 45

• 65.5
• 63.5
• 68.0
• 67.5

• 45
• 21
• 13
• 32
• #### 9.  There are 500 seats in a classroom placed in a similar row. After the reconstruction of the classroom, the total number of seats became 10% less. The number of rows was reduced by 5 but each row contained 5 seats more than before. How many rows and how many seats in a row were there initially in the classroom?

• 20 rows 25 seats
• 25 rows 20 seats
• 50 rows 10 seats
• 10 rows 50 seats
• #### 10.  The average of a certain set of x numbers is y and the average of a certain set of y numbers is x. The average of all the numbers taken together is

• $$\frac{{x + y}}{{2xy}}$$
• $$\frac{{2xy}}{{x + y}}$$
• $$\frac{{{x^2} + {y^2}}}{{x + y}}$$
• $$\frac{{xy}}{{x + y}}$$

• 11
• 12
• 13
• 14

• Rs. 260
• Rs. 270
• Rs. 290
• Rs. 280

• 60.5°C
• 64°C
• 65°C
• 60°C

• Rs. 12785
• Rs. 12585
• Rs. 12675
• Rs. 12875

• 6.1
• 6.23
• 6.97
• 7.12

• 23 years
• 22.5 years
• 20 years
• 18 years
• #### 17.  The average weight of 30 girls is 40kg, another 40 girls is 30kg and another 20 girls is 20kg. Find the average weight of all the girls.

• 28
• $$28\frac{8}{9}$$
• 30
• $$31\frac{1}{9}$$

• 20
• 25
• 15
• 10

• 67 years
• 52 years
• 37 years
• 44 years

• Rs. 91 lakhs
• Rs. 87 lakhs
• Rs. 85 lakhs
• Rs. 89 lakhs
• #### 21.  The average age of 3 people is 46 years. When another man joins the group, the average reduces to 42 years. Now, another woman with age 4 years more than the new man replaces one of the first three people. The average age of these 4 is then 40 years. What is the age of the replaced person?

• 21
• 34
• 42
• None of the above

• 58.18
• 57.82
• 58.81
• 57.28

• 67.50
• 42.45
• 76.55
• 64.50

• 41.1 Kg
• 40.9 Kg
• 42.9 Kg
• 43.1 Kg

• 108 kg
• 112 kg
• 110 kg
• 114 kg
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