1. Suppose that O = {o, r, a, n, g, e}, A = {a, p, 1. e}, B = {b, a, n}.

Put one of the symbols E and €.

a) r... 0

b) p ... A

a) r ∈ O

b) p ∈ A

Step-by-step explanation:

Given:

To put: symbols ∈ or ∉ in the blanks.

Solution:

A set is a well - defined collection of objects.

In mathematics, an element of a set refers to the object that belong to that set.

a) r ∈ O

b) p ∈ A

8 2/3 is the answer

step-by-step explanation: just use a calculator