model 6 find average of excluded number Practice Questions Answers Test with Solutions & More Shortcuts

Question : 11 [SSC CPO 2016]

The average of five numbers is 7. If three new numbers would be added, then the new average comes out to be 8.5. What is the average of those three new numbers?

a) 10.5

b) 11

c) 9

d) 11.5

Question : 12 [SSC CHSL 2012]

If the mean of 4 observations is 20, when a constant 'C’ is added to each observation, the mean becomes 22. The value of C is :

a) –2

b) 2

c) 6

d) 4

Question : 13

The average weight of 12 parcels is 1.8 kg. Addition of another new parcel reduces the average weight by 50 g. What is the weight of the new parcel ?

a) 1.10 kg

b) 1.15 kg

c) 1.50 kg

d) 1.01 kg

Question : 14

The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is :

a) 27

b) 30

c) 25

d) 35

Question : 15 [SSC CGL Tier-I 2013]

The average of 50 numbers is 38. If two numbers namely 45 and 55 are discarded, the average of the remaining numbers is :

a) 32.5

b) 37.5

c) 35

d) 36