9th Class Mathematics Chapter 13 TestUNIT 13: Probability

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which one tells us how often a specific event occurs relative to the total number of frequency event or trials?

   1. Expected frequency

   2. Sum of relative frequency

   3. Relative frequency

   4. Frequency

2. The relative frequency of selecting a red ball from 80 students is: 

   1. 0.29

   2. 0.19

   3. 0.31

   4. 0.12

3. If six dice are rolled 50 times, the expected frequency of a number appearing is given by: 
   

   1. NP(B)

   2. NP(A)

   3. NP(X)

   4. None of these

4. If the probability of an event is 0.3, the probability of its complement is 

   1. 0.4

   2. 0.5

   3. 0.3

   4. 0.7

5. The chance of occurrence of a particular event is called:

   1. Sample space

   2. Estimated probability

   3. Probability

   4. Expected frequency

6. What is the probability of drawing a white ball from a bag containing 5 white and 7 black balls? 

   1. 

   2. 

   3. 

   4. 

7. The probability of an event is always: 

   1. Less than 0

   2. Greater than 1

   3. Equal to 1

   4. Between 0 and 1

8. What is the probability of drawing a red heart from a deck of 52 playing cards? 

   1. 

   2. 

   3. 

   4. 

9. What is the sample space when a single coin is tossed? 
   

   1. {A, B}

   2. {1, 2, 3}

   3. {1, 2, 3, 4}

   4. {H, T}

10. Find out the total number of possible sample space when 4 dice are rolled:

    1. 6²

    2. 6³

    3. 6⁴

    4. 6⁶