Average MCQs

A, B, C and D are four consecutive even numbers respectively and their average is 65. What is the product of A and D?

The arithmetic mean of the series 1, 2, 4, 8, 16, . . . . . . , 2n is -

The following table shows the number of working hours and the number of employees employed in a small scale industry No. of working hours No. of employees 3 - 5 7 5 - 7 10 7 - 9 18 9 - 11 57 11 - 13 14 13 - 15 8 The average number of working hours of an employee is

In Arun’s opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun’s weight is greater is that 60 kg but less than 70 kg. His mother’s view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimation, what is the average of different probable weights of Arun?

The mean of the first ten even natural number is-

The average of the first nine prime numbers is-

The arithmetic mean of first 11 natural numbers is

The total marks obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What is the average marks obtained by him in Physics and Mathematics together?

A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found mean to be 12. What should be the number in place of x?