Sum of Probabilities of All Elementary Events of an Experiment Is Unity

Q.

What is the collective term for aces, jacks, queens and kings in cards?

__

Q.

The probability of an event happening is 0.13, what will be the probability of the event not happening?

1. 0.87
2. 0.54
3. 0.23
4. 0.34

Q.

The sample space associated with an experiment is called the sure event?

1. False

2. True

Q.

Which of the following is/are compound events?

1. An event where compound interest happen

2. An event which has more than one sample point

3. An event combined with another event

4. An event derived from another event

Q. Complete the statement:
The sum of the probabilities of all the elementary events of an experiment is ___.

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

1. $4$
2. $1$
3. $2$
4. $3$