favorable elementary events

Favourable elementary event an elementary event is said to be favourable to a compound event A if it satisfies the definition of the compound.

The sum of probabilities of all the elementary events of an experiment is ...............

Complete the following statements: (i) Probability of an event E + Probability of the event 'not E' =__. (ii) The probability of an event that cannot happen is___ Such an event is called__ (iii) The probability of an event that is certain to happen is__. Such an event is called__. (iv) The sum of the probabilities of all the elementary events of an experiment is (v) The probability of an event is greater than or equal to __ and less than or equal to__

Compound event an event associated to a random experiment is a compound event if it is obtained by combining two or more elementary events associated to the random experiment.

List all events associated with the random experiment of tossing of two coins.How many of them are elementary events?

Definition if there are n elementary events associated with a random experiment and m of them are favourable to an event A then the probability of happening or occurrence of event A is denoted by P(A) and is defined as the ratio (m)/(n) .

Three coins are tossed once. Describe the following events associated with this random experiment: A= Getting three heads, B= Getting two heads and one tail, C= Getting three tails D= Getting a head on the first coin. i. Which pairs of events are mutually exclusive? ii. Which events are elementary events? iii. Which events are compound events?

Elementary an outcome of a random experiment is called an elementary event.

P(barA)=(Favourable number of elementary events to event bar A) / (Total number of elementary events).