What is the correlation coefficient of the straight line ax+by+c=0 wherein a>0 and b <0
Average of 20 numbers is 90. Average of first 8 numbers is 103 while average of last nine numbers is 40. If ninth number is 25% less than the tenth numb...
The average of 9 numbers is 100. The average of the first 4 numbers is 65 and the average of the last 4 numbers is 40. What is the 5th number?
The average age of 12 boys in the group is 9 years. If 2 more boys join the group, the average is increased by 1 year. What is the average age (in years...
The average age of a group of persons going for tour to Shimla is 22 years. 30 new persons with an average age of 8 years join the group and their avera...
The average height of each person in group 'G' having 28 people is 12 cm less than the average height of each person in group 'H' having 24 people. If t...
Average of 8 numbers is 50. If average of first four and last two numbers is 60 and 70, respectively then find the fifth number given that ratio of fift...
The average of the present ages of Arun, Mohan, and Deepak together is 30 years. Five years from now, the sum of the ages of Mohan and Deepak will be 66...
The average weight of apples in a basket is 50 kg. 6 more apples with an average weight of 60 kg are added to the basket. If the average weight of the b...
The average of 24 numbers is 48. If 5 is added to each number, then the new average will be:
The average weight of 12 players in a team is increased by 1/3 kg, when one of the players whose weight is 55 kg is replaced by another player. What is ...
