CBSE Board Practice

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CBSE Grade X - Probability
Question 1
1.
74 cards are numbered 1,2,3,....74 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 divisible by 5?
  • 7
    37
  • 4
    19
  • 30
    37
  • 8
    37
  • 6
    37
Question 2
2.
Two unbiased coins are tossed simultaneously. Find the probability of getting no head.
  • 1
    2
  • 3
    4
  • 1
    4
  • 0
  • 2
    5
Question 3
3.
A missing helicopter is reported to have crashed somewhere in the rectangular region shown in fig. What is the probability that it crashed inside the shaded region as shown in the figure?
  • 1
    4
  • 1
    8
  • 7
    8
  • 2
    9
  • 0
Question 4
4.
A coin is tossed 90 times and head appears 45 times. If the coin is tossed again, what is the probability of getting a tail?
  • 1
    2
  • 3
    4
  • 2
    3
  • 4
    5
  • 5
    6
Question 5
5.
An unbiased die is thrown once. Find the probability of getting a prime number?
  • 1
    2
  • 4
    5
  • 5
    6
  • 3
    4
  • 2
    3
Question 6
6.
Which of the following experiments have equally likely outcomes?
a)
A man throws a die. The number on the top is either 5 or not 5
b)
A true/false question is attempted. The answer is either right or wrong
c)
A baby is born. It is a boy or girl
d)
A ball is hit. It reaches the boundary or not
e)
A man starts his vehicle. It starts or it does not starts
  • {d,c}
  • {d,c,b}
  • {e,a,b}
  • {a,b}
  • {b,c}
Question 7
7.
An unbiased die is thrown once. Find the probability of getting a number greater than 4?
  • 1
    2
  • 2
    3
  • 0
  • 1
    3
Question 8
8.
A box contains 70 discs which are numbered from 1 to 70. If one disc is drawn at random from the box, find the probability that it bears a two-digit number.
  • 61
    70
  • 31
    35
  • 6
    7
  • 62
    71
  • 9
    70
Question 9
9.
A bag contains 10 black marbles, 18 blue marbles, 26 pink marbles and 10 yellow marbles. One marble is drawn at random from the bag. Find the probability that the marble drawn is not black.
  • 28
    33
  • 5
    32
  • 13
    16
  • 7
    8
  • 27
    32
Question 10
10.
Two unbiased dice are thrown simultaneously. Find the probability of getting a doublet.
  • 0
  • 2
    7
  • 1
    6
  • 1
    3
  • 5
    6