SSC Board Practice

Class VI Class VII Class VIII Class IX Class X
SSC Grade X - Probability
Question 1
1.
    • The following table shows the blood-groups of 342 students of a class.
    • Blood group
      O
      B
      AB
      A
      Number of students
      45
      90
      99
      108
    • One student of the class is choosen at random. What is the probability that the choosen student has blood group 'A' ?
  • 7
    19
  • 6
    19
  • 13
    19
  • 5
    19
  • 7
    20
Question 2
2.
A carton consist of 96 shirts of which 81 are good, 10 have minor defects and 5 have major defects. Abhishek, a trader, will only accept the shirts which are good, but Savitha, another trader, will only reject the shirts which have major defects. One shirt is drawn at random from the carton. What is the probability that it is acceptable to Savitha?
  • 5
    96
  • 23
    24
  • 15
    16
  • 92
    97
  • 91
    96
Question 3
3.
A box contains 20 discs which are numbered from 1 to 20. If one disc is drawn at random from the box, find the probability that it bears a number divisible by 5.
  • 0
  • 4
    5
  • 1
    5
  • 1
    3
  • 2
    5
Question 4
4.
Which of the following are possible values of probability?
a)
5
b)
9
1
c)
-1.4
d)
0.67
e)
2
6
  • {b,e}
  • {a,d}
  • {d,e}
  • {b,e,d}
  • {c,a,d}
Question 5
5.
A die is thrown twice. What is the probability that 5 will come atleast once?
  • 12
    37
  • 25
    36
  • 5
    18
  • 11
    36
  • 1
    3
Question 6
6.
Two unbiased coins are tossed simultaneously. Find the probability of getting exactly one head.
  • 1
    2
  • 5
    6
  • 2
    3
  • 4
    5
  • 3
    4
Question 7
7.
A box contains 60 discs which are numbered from 1 to 60. If one disc is drawn at random from the box, find the probability that it bears a two-digit number.
  • 6
    7
  • 17
    20
  • 9
    10
  • 3
    20
  • 4
    5
Question 8
8.
A box contains 33 black marbles, 9 orange marbles, 30 white marbles and 18 red marbles. One marble is drawn at random from the box. Find the probability that the marble drawn is neither black nor red.
  • 14
    31
  • 13
    30
  • 7
    15
  • 17
    30
  • 2
    5
Question 9
9.
An unbiased die is thrown once. Find the probability of getting a number greater than 5?
  • 5
    6
  • 1
    3
  • 0
  • 1
    6
  • 2
    7
Question 10
10.
A bag contains 12 blue marbles, 28 orange marbles, 4 black marbles and 6 gray marbles. One marble is drawn at random from the bag. Find the probability that the marble drawn is blue.
  • 1
    5
  • 7
    26
  • 6
    25
  • 7
    25
  • 19
    25