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Question 1
In a family of husband, wife and their son, the average monthly incomes of husband and wife is Rs. 15600, that of father and son is Rs. 14000 and that of mother and son is Rs. 14400. What is the monthly income of son?
Question 2
A batsman scored 96 runs in his 13th innings and hence his average run is 5 more than that in 12 innings. What is his average after the 13th innings?
Question 3
There are 7 numbers. Average of first 5 numbers is 100. And the Average of last 4 numbers is 76. The average of all 7 numbers is 102. 4th and 5th numbers are in the ratio 4:5. Find the difference of 5th and 4th number.
Question 4
The average marks obtained by 150 students in an examination is 40. If the average marks of passed students is 60 and that of the failed students is 20, then what is the number of students who passed the examination?
Question 5
A boy is riding a bicycle along the circular path of perimeter 120 meters in such a way that his speed is 20 m/s for first 20 meters and for the next 20 meters his speed is 10 m/s. He follows the same pattern for the rest circular path alternatively. The average speed of boy per round of the circular path is:
Question 6
Five consecutive odd numbers have their average k. If next two odd numbers are also added, the new average becomes:
Question 7
The average value of 15 two-digit positive integers is M. If by mistake a number 'xy',where x is ten's digit and y is one's digit, is taken as 'yx' then the average increases to M + 3.6. Find the value of (y - x).
Question 8
Average of yearly water consumption of city A having population 99987 and city B having population 85987 is 991 litres/person and 1009 litres/person respectively. Find the total average of the population of cities A and B.
Question 9
Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 198, then what is the difference between the first and the third number?
Question 10
Average age of 5 students and a teacher is 27 year. If a teacher is excluded the average age becomes 25 years. Find the age of teacher:
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Nov 9SSC & Railway
