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Social forces include changing demographics - in this case an increasing single parent population.
Average run scored by a batsman in first ‘x’ matches is 77. In next 12 matches he scored runs with an average of 90 so that his overall average incr...
The average marks scored by 30 boys and 40 girls are 75 and 85 respectively. Find the average marks scored by all the students together. (Answer should ...
What is the average of odd numbers greater than 10 but less than 30?
Four numbers are arranged in ascending order. When the 1st two numbers are increased by the number equal to their position, and the last two numbers (i....
There are only 220 students living in hostel. If 20 students left hostel, then overall expenditure of mess is reduced by Rs. 800 weekly but per student ...
If average of first 12 numbers is (n – 23) and the sum of remaining number is 925. Find the value of ‘n’, if the average of 22 numbers is ‘n’....
Average age of 25 students is 15 years. If 5 students leave the class, the average age decreases by 1 year. Find the average age of the students who lef...
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...
Average run scored by a batsman in first ‘x’ matches is 20. In next 5 matches he scored runs with an average of 60 so that his overall average incre...