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Q.1. One card is drawn from a well shuffled deck of 52 cards. What is the probability of a king of red colour ?

2/52 = 1/26


Q.2. A bag contains 3 red and 5 black balls. A ball is drawn at random. What is the probability that the ball is red ?

3/8


Q.3. If P(E) = 0.05, what is the probability of ‘not E’ ?

0.95.


Q.4. What is the probability of an impossible event, sure event respectively ?

Zero, one.


Q.5. What is probability ?

The possibility (or possibilites) of occuringornotoccuringof an eventis called probability.
Viva Vocel: Probability - Class 10


Q.6. A die is thrown once. What is the probability of getting a prime number ?

3/6 = 1/2


Q.7. What is the sum of the probabilities of all the elementary events of an experiment ?

One


Q.8. A dice is thrown twice. How many elements are possible in sample space ?

36


Q.9. What is a sample space?

It is the set of all possible outcomes of a random experiment.


Q.10. 17 cards numbered 1, 2, 3, … 17 are put in a box and mixed. One person draws a cards. Find the probability that the number on the card is prime.
(a) 15/17
(b) 7/17
(c) 8/17
(d) 9/17 

Correct options is (b)

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