SSC CHSL 202121)
The average monthly expenditure of a family was Rs.18,600 during the first three months, Rs.21,750 during the next four months, and Rs.22,840 during the last five months of a year. If the total savings during the year was Rs.1,43,020, then the average monthly income (in Rs.) of the family was:
SSC CHSL 202122)
The average number of electronic items sold by a trader in 2004, 2005, 2006 and 2007 is 18950 and that sold in 2005, 2006, 2007 and 2008 is 21725. If the number of items sold in 2008 is 12750, then the number of items sold in 2004 is:
SSC CHSL 202123)
The average age of 125 students in a group is 16.2 years. 40% of the students are boys and the rest are girls. The average age of the boys is 20% more than the average age of the girls. What is the average age (in years) of the boys?
SSC CHSL 202124)
The average of the numbers a, b, c and d is 2d + 4. Also, the averages of the numbers a and b; b and c; c and d are 8, 5 and 4, respectively. If e = a + d - 1, then what is the average of the numbers d and e ?
(a+b+c+d) = 4(2d + 4)...(i)
a + b = 16, b + c = 10, c + d = 8
By substituting value of a + b and c + d in eqn..(i), we get d = 1;
Now again substituting the value of b + c and d in eqn ... (i), we get a = 13
e = a + d - 1, thus e = 13
(e+d)/2 = (13 + 1)/2 = 7
SSC CHSL 202125)
The average weight of some persons in a group is 72 kg. When 5 persons with average weight 66.6 kg join and 13 persons with average weight 75 kg leave the group, the average weight of the persons in the group decreases by 1.65 kg. How many persons were there in the group initially?
SSC CHSL 202126)
The average monthly expenditure of a man is Rs.2400 during the first three month, Rs 3,500 during the next five months and Rs 4,800 for the remaining four months. If his total saving is Rs.3,500 during the entire year. then what is his average monthly income (in Rs)?
SSC CHSL 202127)
The average of the squares of four consecutive even natural numbers is 126. The average of 8 times of the greatest number and 5 times of the smallest number is:
SSC CHSL 202128)
The average weight of some students in a class was 69.5 kg. When 10 students of average weight 68 kg joined the class, and 6 students of average weight 60 kg left the class, it was noted that the average weight of the new group of students increased by 2 kg. How many students are there in the class now?
SSC CHSL 202129)
If the average of the 3 digit numbers 335, 2x5, x35, 63x and 406 is 411, then what will be the average of x - 1, x - 3, x + 3 and x + 5 ?
SSC CHSL 202130)
The average score of 84 students (boys and girls) in a test is 95. The ratio of the number of boys to that of girls is 10 : 11. The average score of the boys is 20% less than that of the girls. What is the average score of the boys in the test?