SSC Board Practice

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SSC Grade IX - Probability
Question 1
1.
One card is drawn at random from a well shuffled deck of 52 cards. What is the probability that the card drawn is '2' of black suit ?
  • 3
    13
  • 1
    52
  • 1
    26
  • 1
    13
  • 1
    4
Question 2
2.
Suppose a die is thrown on a rectangular region as shown below. What is the probability that it will land inside the circle of diameter 4.00 cm?
  • 2173
    2261
  • 89
    2261
  • 89
    2262
  • 87
    2261
  • 88
    2261
Question 3
3.
Three unbiased coins are tossed simultaneously. Find the probability of getting at least two heads.
  • 5
    6
  • 1
    2
  • 4
    5
  • 3
    4
  • 2
    3
Question 4
4.
A bag contains 28 black balls, 16 orange balls, 6 blue balls and 24 white balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is black or orange.
  • 22
    37
  • 15
    37
  • 23
    37
  • 23
    38
  • 21
    37
Question 5
5.
Two unbiased coins are tossed simultaneously. Find the probability of getting no head.
  • 0
  • 2
    5
  • 1
    2
  • 1
    4
  • 3
    4
Question 6
6.
When two coins are tossed simultaneously, how many elementary events are possible?
  • 2
  • 3
  • 5
  • 6
  • 4
Question 7
7.
A box contains 36 red marbles, 28 yellow marbles, 48 orange marbles and 32 white marbles. One marble is drawn at random from the box. Find the probability that the marble drawn is neither orange nor white.
  • 1
    3
  • 4
    9
  • 1
    2
  • 5
    9
Question 8
8.
Which of the following experiments have equally likely outcomes?
a)
A ball is hit. It reaches the boundary or not
b)
A true/false question is attempted. The answer is either right or wrong
c)
A man throws a die. The number on the top is either 1 or not 1
d)
A man starts his vehicle. It starts or it does not starts
e)
A baby is born. It is a boy or girl
  • {a,b}
  • {b,e}
  • {c,e,b}
  • {d,a,b}
  • {c,e}
Question 9
9.
When a card is selected randomly out of a pack of cards, how many elementary events are possible?
  • 52
  • 54
  • 51
  • 53
  • 50
Question 10
10.
One card is drawn at random from a well shuffled deck of 52 cards. What is the probability that the card drawn is a red queen?
  • 1
    13
  • 1
    26
  • 3
    13
  • 1
    4
  • 1
    52