Candidates of four schools appear in a mathematics test. The data were as follows: Schools        No. of Candidates         Average Score I                   60                                  75 II                  48                                  80 III                Not available                 55 IV                40                                  50 If the average score of the candidates of all the four schools is 66, find the number of candidates that appeared from school III.

Candidates of four schools appear in a mathematics test. The data were as follows School, No. of Candidates, Average Score I II III IV, 60 48 Not available 40, 75 80 55 50 If the average score of the candidates of all the four schools is 66, find the number of candidates that appeared from school III.

The average score of boys in an examination of a school is 71 and that of girls is 73. The average score of school in that examinations is 71.8. The ratio of the number of boys to the number of girls appeared in the examination, is

A school has four sections in Class XII having 50, 39, 42, 48 students of the four section. In a mathematics test the average marks were 60, 55, 57 and 48 respectively. What was the overall average of the marks per student?

Six candidtes are called for interview to fill four posts in an office. Assuming that each candidate is fit for each ost, determine the number of ways in which i. first and second posts can be filled. ii.First three posts can be filled. iii. All the four posts can be filled.

In which of the following situations, do the lists of numbers involved form an AP? Give reasons for your answers. (i) The fee charged from a student every month by a school for the whole session, when the monthly fee is Rs. 400. (ii) The fee charged every month by a school from classes I to XII, When the monthly fee for class I is Rs. 250 and it increases by Rs. 50 for the next higher class. (iii) The amount of money in the account of Varun at the end of every year when Rs. 1000 is deposited at simple interest of 10% per annum. (iv) The number of bacteria in a certain food item after each second, when they double in every second.