A and B are mutually exclusive events. P(A) = 0.60 and P(B) =0.20. What is P(A or B)?

As they are mutually exclusive events so

P(A) = 0.60

P(B) = 0.20

p(A or B) = P(A) + P(B)

= 0.60 + 0.20

= 0.80

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.