Page 1 - Worksheet- Ch-15-Probability

SAI International School
CLASS - IX

Mathematics
CHAPTER-15: PROBABILITY

Worksheet
1. If probability of an event is represented by ‘p’ then choose the correct statement: 1

a. p≤0 b. 0<p≤1 c. 0≤p≤1 d. -1≤p≤1
2. A dice is thrown. The probability of getting 1 and 5 is: 1
1
2
1
1
a. b. c. d.
6 3 3 2
3. Probability of getting even number in a single throw of dice is 1
2
5
1
1
a. b. c. d.
6 2 6 3
4. The probability of each event, when a coin is tossed for 1000 times with 1
frequencies: Head:455 & Tail: 545 is:
a. 0.455 & 0.545
b. 0.5 & 0.5
c. 0.45 & 0.55

d. 455 & 545

5. The sum of all probabilities equal to_________. 1

6. If P(E) = 0.44, then P (not E) will be__________. 1

7. The probability of a sure event is _____. 1

8. A die is thrown once. Write the Sample Space. 1

9. What are the possible outcomes when a coin is tossed? 1

10. What is the probability of an impossible event? 1

11. There are 50 tickets numbered from 1 to 50 in a box. Write the sample space 2
and also find the probability of drawing a ticket bearing prime number.
12. There are 5 red and 3 black balls in a bag. Find the probability of drawing 2
(i) a black ball and (ii) a blue ball.

13. When a die is thrown, find the probability of getting 2
(i)a prime number ii) a number not greater than 5

14. In a box, there are 9 red, 8 white and 3 black balls. One ball is taken out of the 3
bag. Find the probability that it is

1