CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade X - Probability
Question 1
1.
Two coins are tossed simultaneously 80 times and it was observed that both tails appeared 30 times. If two coins are tossed simultaneously at random, what is the probability of getting both tails?
  • 1
    4
  • 1
    2
  • 4
    9
  • 3
    8
  • 5
    8
Question 2
2.
Bharathi and Ankitha are friends. What is the probability that both will have different birthdays? (ignoring a leap year).
  • 365
    366
  • 364
    365
  • 1
    365
  • 363
    365
  • 1
Question 3
3.
    • The distances (in km) of engineers from their residence to their place of work were found as follows
      • 14
      • 15
      • 10
      • 10
      • 23
      • 24
      • 14
      • 7
      • 1
      • 14
      • 12
      • 16
      • 12
    • What is the empirical probability that an engineer lives greater than 23 km from her place of work?
  • 1
    13
  • 1
    7
  • 2
    13
  • 0
  • 12
    13
Question 4
4.
There are 64 students in a class room of whom 38 are boys and 26 are girls. From these students, one is choosen at random. What is the probability that the choosen student is a boy ?
  • 20
    33
  • 19
    32
  • 13
    32
  • 9
    16
  • 5
    8
Question 5
5.
One card is drawn at random from a well shuffled deck of 52 cards. What is the probability that the card drawn is a face card ?
  • 1
    52
  • 1
    26
  • 1
    13
  • 1
    4
  • 3
    13
Question 6
6.
When two coins are tossed simultaneously, how many elementary events are possible?
  • 5
  • 6
  • 3
  • 1
  • 4
Question 7
7.
Two unbiased dice are thrown simultaneously. Find the probability of getting at least 11 as the sum of the two numbers on the dice.
  • 11
    12
  • 1
    6
  • 0
  • 1
    12
  • 2
    13
Question 8
8.
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?
  • 1
    52
  • 3
    13
  • 1
    4
  • 1
    13
  • 1
    26
Question 9
9.
A bag contains 65 red balls, 60 pink balls, 55 blue balls and 20 yellow balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is red.
  • 13
    40
  • 27
    40
  • 7
    20
  • 3
    10
  • 14
    41
Question 10
10.
Which of the following are true?
a)
The probability of an event that cannot happen is unknown
b)
If the probability is too less, it will become negative
c)
If the probability of failing the exam is 0.67, the probability of passing the exam is 0.33
d)
Probability of getting 101 marks out of 100 is 1.01
e)
The probability of an event that is very likely to happen is 1
  • {b,c}
  • {c}
  • {d,e,c}
  • {a,c}