The average wage of a group of 20 labourers is Rs. 500. If 4 persons receiving average wage of Rs. 360 leave the group and 2 persons receiving average w...
In a school with 400 students, the average age of the boys is 16 years and that of the girls is 12 years. If the average age of school is 14 years 9 m...
The meaning of 12 observations is 15. One more observation is included, and the new mean becomes 17. The 13th observation is.
In an examination, the average marks obtained by the students is 75. After correcting the quantitative mistakes, the average of 100 students is reduced...
The average score obtained by 10 students in a class test is 68 marks. The top place was shared by 3 people who got the same score. If the lowest score ...
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 50 and ratio of the 4th and the 5th number is 2:3. If difference between t...
Average of four numbers is 18. Sum of smallest and largest number is 32. If difference between other two numbers is 2, then find the square of second sm...
The average of 13 numbers is 10.The average of first 6 numbers is 8 and that of the last 6 numbers is 10. What will be the 13th number?
The average age of 6 sisters is 30 yr. If the age of the youngest sister be 5 yr. What was the average age of the group of sister just before the birth ...
In an examination the average marks of Rohit is 60. If he got 15 more marks in science and 21 more marks in maths then his average would have been 66. F...