CBSE Board Practice

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CBSE Grade X - Probability
Question 1
1.
68 cards are numbered 1,2,3,....68 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 less then 22?
  • 11
    34
  • 22
    69
  • 21
    68
  • 47
    68
  • 5
    17
Question 2
2.
A die is thrown twice. What is the probability that 1 will not come up either time?
  • 26
    37
  • 2
    3
  • 11
    36
  • 13
    18
  • 25
    36
Question 3
3.
In a lottery, there are 23 prizes and 14 blanks. What is the probability of getting a prize?
  • 14
    37
  • 23
    37
  • 12
    19
  • 24
    37
  • 22
    37
Question 4
4.
One card is drawn at random from a well shuffled deck of 52 cards. What is the probability that the card drawn is either a black card or a jack?
  • 1
    26
  • 3
    13
  • 1
    13
  • 7
    13
  • 1
    52
Question 5
5.
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
  • 1
    4
  • 2
    5
  • 0
Question 6
6.
Two unbiased coins are tossed simultaneously. Find the probability of getting no head.
  • 1
    4
  • 3
    4
  • 1
    2
  • 0
  • 2
    5
Question 7
7.
A bag contains 20 yellow balls, 56 gray balls, 52 black balls and 36 red balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is neither yellow nor gray.
  • 19
    41
  • 23
    41
  • 21
    41
  • 22
    41
  • 23
    42
Question 8
8.
    • 216 families with 2 children were selected randomly, and the following data were recorded
    • No. of girls in a family
      0
      1
      2
      Number of families
      63
      72
      81
    • Compute the probability of the family, chosen at random, having 1 girl.
  • 0
  • 1
    3
  • 2
    3
  • 1
    2
Question 9
9.
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 12.00 cm?
  • 29
    161
  • 89
    483
  • 88
    483
  • 89
    484
  • 395
    483
Question 10
10.
A bag contains 40 white marbles, 35 black marbles, 70 pink marbles and 20 orange marbles. One marble is drawn at random from the bag. Find the probability that the marble drawn is white.
  • 3
    11
  • 9
    34
  • 25
    33
  • 8
    33
  • 7
    33