SSC Board Practice

Class VI Class VII Class VIII Class IX Class X
SSC Grade X - Probability
Question 1
1.
In a lottery, there are 15 prizes and 16 blanks. What is the probability of not getting a prize?
  • 16
    31
  • 17
    31
  • 17
    32
  • 15
    31
Question 2
2.
Two unbiased coins are tossed simultaneously. Find the probability of getting at least one head.
  • 3
    4
  • 1
    4
  • 1
  • 4
    5
  • 1
    2
Question 3
3.
Which of the following are true?
a)
    • P(E) + P(
    •  

      E
       
       
    • ) = 0
b)
    • P(E) - P(
    •  

      E
       
       
    • ) = 0
c)
    • P(E) + P(not E) = 1
d)
    • P(E) - P(not E) = 0
e)
    • P(E) = 1 - P(
    •  

      E
       
       
    • )
  • {a,c}
  • {b,e}
  • {b,e,c}
  • {d,a,c}
  • {c,e}
Question 4
4.
What is the probability of a sure event?
  • 0
  • 3
    4
  • 1
    2
  • 1
    4
  • 1
Question 5
5.
65 cards are numbered 1,2,3,....65 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 15?
  • 3
    13
  • 51
    65
  • 5
    22
  • 14
    65
  • 1
    5
Question 6
6.
    • The following table shows the blood-groups of 252 students of a class.
    • Blood group
      O
      B
      AB
      A
      Number of students
      45
      54
      72
      81
    • One student of the class is choosen at random. What is the probability that the choosen student has blood group 'O' ?
  • 23
    28
  • 1
    7
  • 5
    28
  • 3
    14
  • 6
    29
Question 7
7.
When two coins are tossed simultaneously, how many elementary events are possible?
  • 5
  • 4
  • 3
  • 1
  • 7
Question 8
8.
Two coins are tossed simultaneously 80 times and it was observed that both tails appeared 60 times. If two coins are tossed simultaneously at random, what is the probability of getting both tails?
  • 3
    4
  • 1
    2
  • 1
    4
  • 1
  • 4
    5
Question 9
9.
A die is thrown twice. What is the probability that 2 will not come up either time?
  • 13
    18
  • 11
    36
  • 2
    3
  • 25
    36
  • 26
    37
Question 10
10.
64 cards are numbered 1,2,3,....64 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?
  • 3
    16
  • 13
    16
  • 4
    17
  • 1
    4
  • 1
    8