In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )
A certain amount invested at a certain rate, compounded annually, grows to an amountin five years, which is a factor of 1.191016 more than to whatit would have grown in two years. Whatis the rate percentage?