# Class 10 Maths Probability (Assignment)

**Complete the following statements with suitable word(s).**

1. Probability of an event E + Probability of the event ‘not E’ = _______ .

2. The probability of an event that cannot happen is ________ . Such an event is called ___________ .

3. The probability of an event that is certain to happen is ________ . Such an event is called ___________ .