The average of a, b, c is 20 and that of b, c, d is 25; if d = 30, then the value of a is

• 25

• 45

• 30

• 30

The average monthly salary of 19 members of a group is ₹ 16000/-. If one more members whose monthly salary is ₹ 20000/- has joined the group, then the average salary of the group is

• ₹ 18,250

• ₹ 16,200

• ₹ 18,000

• ₹ 18,000

An hour-long test has 60 problems. If a student completes 30 problems in 25 minutes, then the required seconds he has taken on average for computing each of the remaining problems is

• 70 seconds

• 50 seconds

• 40 seconds

• 40 seconds

A and B have their annual average income Rs. 80,000. B and C have their annual average income Rs. 75,000. C and A have their annual average income Rs. 78,000.The annual income of A is?

• Rs. 81000

• Rs. 82000

• Rs. 83000

• Rs. 83000

In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the target of 282 runs 

• 6.4

• 6.3

• 6.25

• 6.25

The average (arithmetic mean) amount of savings of ten students is Rs. 600. Three of the students have no savings at all and each of the others have at least Rs. 250 including Nihar, who has exactly Rs. 1300. The largest amount, in Rs., that any one student could have is

• Rs. 3250

• Rs. 3450

• Rs. 3650

• Rs. 3650

The average weight of first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the average weight of all the 12 persons. The weight of the 12th person is

• 128.75 kg

• 128 kg

• 131 kg

• 131 kg

The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. The average of the remaining two numbers is

• 4.6

• 4.5

• 4.8

• 4.8

If the average of eight consecutive numbers be 93, then the greatest number among them is

• 100

• 86

• 102

• 102

30.

If the arithmetic mean of 3a and 4b is greater than 50, and a is twice b, then the smallest possible integer value of a is 

• 20

• 18

• 21

• 21