Q 1) What is probability?
Ans. – Probability is the possibility of the occurrence of any event. When an event occurs, the chances of favorable outcomes are the value of probability.
Q 2) What is the formula of probability?
Ans. – Probability of an event = Number of favorable outcomes/total number of outcomes.
For event A, we can write the formula,
Probability of event A, P(A) = number of favorable outcomes of event A/total number of outcomes of event A.
Q 3) What is an event?
Ans. – An event is the collection of possible outcomes of an experiment.
Q 4) What is the relation between ‘probability’ and ‘not probability’?
Ans. – ‘Probability’ of an event is shown as P(E) and the ‘not probability’ of an event is shown as P(E’).
Relation between P(E) and P(E’),
P(E) + P(E’) = 1
Or P(E) = 1 – P(E’) and P(E’) = 1 – P(E)