Probability

Probability Worksheet-1

Sample space: The set of all possible outcomes of a trial (random experiment) is called its sample space

Equally likely events: Events are equally likely if there is no reason for an event to occur in preference to any other event.

 Exhaustive number of cases: The total number of possible outcomes of a random experiment in a trial is known as the exhaustive number of cases.

Favourable number of cases: The number of cases favourable to an event in a trial is the total number of elementary events such that the occurrence of any one of them ensures the happening of the event.

Probability Worksheet-2

1. What is the probability of picking a vowel from the word "SLEIGH"?

A. 2/3                 B. 1/2                  C. 1/6                  D. 1/3

2. How many different 4-digit numbers can be made using only the numbers 6, 7, 8 and 9? All four digits must be used only once in each number.

A. 16                    B. 8                     C. 20                   D. 24