SSC Board Practice

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SSC Grade IX - Probability
Question 1
1.
When a card is selected randomly out of a pack of cards, how many elementary events are possible?
  • 52
  • 53
  • 50
  • 51
  • 55
Question 2
2.
One card is drawn at random from a well shuffled deck of 52 cards. What is the probability that the card drawn is a queen of clubs?
  • 1
    4
  • 3
    13
  • 1
    13
  • 1
    26
  • 1
    52
Question 3
3.
In a musical chair game, the person playing the music has been advised to stop playing the music at any time with in 2 minutes after she starts playing. What is the probabilty that the music will stop within the first half-minute after starting?
  • 3
    4
  • 1
    2
  • 2
    5
  • 1
    4
  • 0
Question 4
4.
Two coins are tossed simultaneously 90 times and it was observed that both heads appeared 50 times. If two coins are tossed simultaneously at random, what is the probability of getting both heads?
  • 5
    9
  • 4
    9
  • 3
    5
  • 2
    3
Question 5
5.
In a lottery, there are 18 prizes and 20 blanks. What is the probability of not getting a prize?
  • 11
    20
  • 10
    19
  • 11
    19
  • 9
    19
Question 6
6.
97 cards are numbered 1,2,3,....97 and put in a box and mixed thoroughly. A card is drawn at random. What is the probability that the number on the drawn card is an odd number?
  • 50
    97
  • 48
    97
  • 25
    49
  • 49
    97
Question 7
7.
A box contains 6 pink balls, 24 black balls, 30 white balls and 33 gray balls. One ball is drawn at random from the box. Find the probability that the ball drawn is not black.
  • 3
    4
  • 22
    31
  • 23
    31
  • 8
    31
  • 24
    31
Question 8
8.
An unbiased die is thrown once. Find the probability of getting a 1?
  • 1
    6
  • 2
    7
  • 0
  • 5
    6
  • 1
    3
Question 9
9.
An unbiased die is thrown once. Find the probability of getting a prime number?
  • 4
    5
  • 5
    6
  • 3
    4
  • 2
    3
  • 1
    2
Question 10
10.
Two unbiased coins are tossed simultaneously. Find the probability of getting exactly one head.
  • 1
    2
  • 2
    3
  • 3
    4
  • 4
    5
  • 5
    6