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The correct answer is D
The average cost price of 21 pens (having equal cost price) decreased by Rs.3, when one of the pen is replaced by a new pen having cost price of Rs.55. ...
The average Economics marks of two sections A and B of class X in the annual examination is 70. The average marks of Section A is 72.5 and that of secti...
The average of 18 numbers is 40, and the average of the first 9 numbers is 45. Find the average of the remaining 9 numbers.
The average weight of 9 students in a seminar is 42 kg. If the weight of 4 facilitators is also included, then the new average weight of each person (fa...
The average age of 4 children in a family is 30% of the average age of the mother and the youngest child. The total age of the father and the eldest chi...
The mean weight of 'w' students in a classroom is 42 kg. When the class teacher, weighing 61.5 kg, is added to the group, the average weight increases b...
The average weight of a group of five persons, A, B, C, D, and E is 60 kg. If another person K joins the group then the average weight of the group is d...
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 70 and ratio of the 4th and the 5th number is 2:3. If difference between t...
In an exam of 100 marks, the average marks of a class of 38 students are 72. If the top 3 scorers of the class leave, the average score falls “dow...
The average of 8 numbers is 5.95. The average of two of them is 5.4, while the average of the other two is 5.86. the average of the remaining four numbe...
