RD Sharma Class 10 Solutions Chapter 13: Probability
- We find the probability of the occurrence of an event by actually performing the experiment a number of times and adequate recording of the happening of event.
- An Outcome of a random experiment is called an elementary event.
- Probability of an event E, written as P(E), is defined as
- An event associated to random experiment is a compound event if it is obtained by combining two or more elementary events associated to the random experiment.
- An event having only one outcome is called an elementary event. The sum of the probabilities of all the elementary events of an experiment is 1.
- The probability of a sure event (or certain event) is 1.
- The probability of an impossible event is 0
- The probability of an event E is a number P(E) such that
- For any event E, , where stands for ‘not E’. E and are called complementary events.
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