121.

If two numbers are in the ratio 2:3 and the ratio becomes 3:4 when 8 is added to both the numbers, then the sum of the two numbers is

• 40

• 10

• 100

• 100

A librarian purchased 50 story-books for his library. But he saw that he could get 14 more books by spending ₹ 76 more and the average price per book would be reduced by ₹ 1. The average price (in ₹) of each book he bought, was

• 20

• 25

• 15

• 15

If , then the value of 

• 110

• 120

• 140

• 140

Study the following bar diagram and answer the questions. 
Electricity units consumed by a family in two consecutive years during July to November.


The maximum difference in the units consumption between these two years has been found in the month of

• August

• July

• November

• November

Study the following bar diagram and answer the questions. 
Electricity units consumed by a family in two consecutive years during July to November.

In how many months in 2012, the consumption of electric units was more than the average units consumption in that year?

• 2

• 4

• 5

• 5

Study the following bar diagram and answer the questions. 
Electricity units consumed by a family in two consecutive years during July to November.

The average electric consumption by the family during these 5 months in 2013 is

• 440 units

• 450 units

• 400 units

• 400 units

Study the following bar diagram and answer the questions. 
Electricity units consumed by a family in two consecutive years during July to November.


The total units consumption in the year 2013 during these 5 months, in respect of the same in the previous year has been

• decreased by 2.27%

• increased by 2.22%

• found unaltered

• found unaltered

The percentage of metals in mine of lead ore is 60%. Now, the percentage of silver is  of metals and the rest is lead. If the mass of ore extracted from this mine is 8000 kg, the mass (in kg) of lead is

• 4763

• 4764

• 4762

• 4762

If  then the value of 

Average weight of 3 men A, B, C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E whose weight is 3kg more than that of D replaces A, then the average weight of B, C, D and E becomes 79 kg. The weight of A (in kg) is

• 80

• 70

• 72

• 72