model 1 basic average questions Practice Questions Answers Test with Solutions & More Shortcuts

Question : 16 [SSC Multi-Tasking Staff 2013]

Six tables and twelve chairs were bought for Rs.7,800. If the average price of a table is Rs.750, then the average price of a chair would be

a) Rs.150

b) Rs.175

c) Rs.275

d) Rs.250

Question : 17 [SSC CGLTier-I 2012]

The average monthly expenditure of a family is Rs.2,200 during first three months,Rs.2,550 during next four months and Rs.3,120 during last five months of the year. If the total savings during the year was Rs.1,260, what is the average monthly income ?

a) Rs.2,805

b) Rs.2,850

c) Rs.1,280

d) Rs.1,260

Question : 18 [SSC FCI 2013]

There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A is 25 kg and that of group B is 40 kg, find the average weight of the whole class.

a) 70 kg

b) 30 kg

c) 31 kg

d) 69 kg

Question : 19 [SSC CISF 2010]

The mean of 9 observations is 16. One more observation is included and the new mean becomes 17. The 10th observation is

a) 26

b) 30

c) 16

d) 9

Question : 20 [SSC CAPFs SI, CISF 2015]

The average of some natural numbers is 15. If 30 is added to first number and 5 is subtracted from the last number the average becomes 17.5 then the number of natural number is

a) 20

b) 10

c) 30

d) 15