If x(a – b + ab/a – b) = y(a + b – ab/a + b) and x + y = 2a³, then what is x – y equal to?

Consider the following statements about a joint-stock company: 1. It has a legal existence. 2.…

The harmonic mean and the geometric mean of two numbers are 10 and 12 respectively.…

What is the median of 2, 4, 6, …, 100?

The mean of five observations x, x + 2, x + 4, x + 6,…

What is the algebraic sum of the deviations from the mean of a set of…