Define class.

If the relation R in a set of integers defined as R = {(a, b): (a + b) is divisible by 7}, is an equivalence relation, then the equivalence class containing 0 is:

Let R be the equivalence relation on z defined by R = {(a,b):2 "divides" a - b} . Write the equivalence class [0].

If the class mark of a class is 25 and the class width is 10, find the class.

Let L be the lower class boundary of a class in a frequency distribution and m be the midpoint of the class. Which one of the following is the upper class boundary of the class.

Let L be the lower class boundary of a class in a frequency distribution and m be the mid point of the class. Which one of the followng is the upper class boundary of the class?

Let Ube the upper class boundary of a class in a frequency distribution and Mbe the mid-point of the class. Which one of the following is the lower class boundary of the class?