The average of twelve numbers is 45.5. The average of the first four numbers is 41.5 and that of the next five numbers is 48. The 10th number is 4 more than the 11th number and 9 more than the 12th number. What is the average of the 10th and 12th numbers?
The average monthly expenditure of a family was ₹18,600 during the first three months, ₹21,750 during the next four months and ₹22,840 during the last five months of a year. If the total savings during the year was ₹1,43,020, then the average monthly income(in₹) of the family was
30 people went to a restaurant for a dinner party. 20 of them paid ₹880 each and each of the rest of them paid ₹110 more than the average of the total expenses. What was the total expense (in ₹) for the dinner?
There are three groups G1, G2 and G3 in a College with 20, 40 and 60 students respectively. The average marks obtained by groups G1, G2 and G3 are 50%, 60% and 70% respectively. Find the average marks of the entire college?
The average of twelve numbers is 55.5. The average of the first four numbers is 53.4 and that of the next four numbers is 54.6. The 10th number is greater than the 9th number by 3 but lesser than the 11th and 12th numbers by 2 and 3, respectively. What is the average of the 10th and the 12th numbers ?
The average weight of 30 persons of group A is 3 kg more than the average weight of 25 persons of group B. The average weight of 25 persons of group is 2.5 kg more than the average weight of 20 persons of group C. If the total weight of 30 persons of group A is 1725 kg, then what will be the average weight of the persons of group A and group C taken together (in kg)?