**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.

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**Probability Worksheet-2**

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

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

- 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

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