# NCERT Class 9 MathematicsProbability Board Sample Problems

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**Empirical Probability**

It is a probability of event which is calculated based on experiments

Einprical Probability

Example:

A coin is tossed 1000 times; we get 499 times head and 501 time’s tail,

So empirical or experimental probability of getting head is calculated as

499

Einpirical probability depends on experiment and different will get different values based on the experiment

(a) If the event A, B, C covers the entire possible outcome in the experiment. Then,

(b) The probability of an event (U) which is impossible to occur is O. Such an event is called an impossible event

(c) The probability of an event (X) which is sure (or certain) to occur is 1. Such an event is called a sure event or a certain event

(d) Probability of any event can be as