A, B, C, D, E, F are the only six families in Indira Nagar. A, B, C, D, E and F

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Question
A, B, C, D, E, F are the only six families in Indira Nagar. A, B, C, D, E and F has 7, 8, 10, 13, 6, and 10 member in their families respectively. If 1 member from all the six families left their respective families to accommodate themselves in the hostel of IIM Lucknow, then the average number of member now in each family of Indira nagar is
Options
A. 8
B. 9
C. 10
D. 13

Correct Answer

8

Explanation

Required average
= (( 7 - 1 ) + ( 8 - 1 ) + ( 10 - 1 ) + ( 13 - 1 ) + (6 - 1) +( 10 - 1 ) )/ 6
= ( 7 + 8 +10 + 13 + 6 + 10 ) / 6 - ( 6 x 1 ) / 6
=9 - 1 = 8

Average problems

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1.
A, B, C, D, E are the five electronic shops in the Naza market, which have 20, 30, 60, 80 and 50 T. V . sets with them respectively, then the average number of T. V. sets in each shop is
Options
A. 24
B. 48
C. 50
D. 60

2.
The Average of 100, 200, 300, 400, ... , 1000 is 550. If each number is divided by 5, then the new average will be equal to
Options
A. 450
B. 45
C. 55
D. None of these

3.
The salary of A, B, C, D, E is Rs. 8000, Rs. 5000, Rs. 11000, Rs. 7000, Rs. 9000 per month respectively, then the average salary of A, B, C, D, and E per month is
Options
A. Rs. 7000
B. Rs. 8000
C. Rs. 8500
D. Rs. 9000

4.
The average of 6 number 13, 17, 25, 11, 26, 10 is
Options
A. 20
B. 17
C. 15
D. 25

5.
The average age of 7 member of Patel's family is 25 year. The average age of the same family 3 year ago was
Options
A. 21 year
B. 22 year
C. 25 year
D. none of these

6.
The average number of shirts with Salman, Ambani and Dalmiya is 60, if all of them reached a shopping mall in Delhi and purchased 6 shirts each of them then average number of shirt each of them now has
Options
A. 66
B. 63
C. 62
D. can't be determined

7.
In a flower shop there were 6 flowers in each bouquet. If the seller has doubled the number of flowers in each bouquet then the new average of flowers in each bouque is
Options
A. 12
B. 3
C. 8
D. none of these

8.
The average salary of A, B is Rs. 6000 and that of C, D and E is Rs. 8000. The average salary of all the 5 people is
Options
A. Rs.7200
B. Rs. 7000
C. Rs. 7500
D. can't be determined

9.
The average salary of Rajesh, Bahadur and Amir is Rs. 8000 per month. The average expenditure of Rajesh , Bahadur and Amir per month is Rs. 5000. The average savings of all the 3 persons per month is
Options
A. Rs. 3000
B. Rs. 5000
C. Rs. 2500
D. Rs. 9000

10.
The average salary of A, B and C is Rs.10,000 and average expenditure of A is Rs. 6000 then the average savings of B and C is
Options
A. Rs. 5500
B. Rs. 4500
C. Rs. 4000
D. can't be determined

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