5.9 What is the probability of the following events?

(a) The sum of all the angles of a triangle is equal to 180°

(b) All 4 sides of a square are equal

(C) The sum of 2 negative integers is positive

(d) Two parallel lines are intersecting at a point

Answer:a) 1 it is sure event

b) 1 it is also sure event

c) 0 it is impossible event

d) 0 it is also impossible event

Answer:the probability of the given events are

a)1

b)1

c)0

d)0