SSC Board Practice

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SSC Grade IX - Probability
Question 1
1.
A bag contains 6 yellow marbles, 45 pink marbles, 42 blue marbles and 36 gray marbles. One marble is drawn at random from the bag. Find the probability that the marble drawn is not pink.
  • 27
    43
  • 28
    43
  • 29
    44
  • 29
    43
  • 15
    43
Question 2
2.
When two dice are thrown simultaneously, how many elementary events are possible?
  • 39
  • 35
  • 37
  • 33
  • 36
Question 3
3.
When two coins are tossed simultaneously, how many elementary events are possible?
  • 3
  • 6
  • 1
  • 5
  • 4
Question 4
4.
In a lottery, there are 11 prizes and 16 blanks. What is the probability of not getting a prize?
  • 17
    28
  • 5
    9
  • 11
    27
  • 17
    27
  • 16
    27
Question 5
5.
A carton consist of 69 shirts of which 60 are good, 6 have minor defects and 3 have major defects. Anthony, a trader, will only accept the shirts which are good, but Rajini, 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 Anthony?
  • 20
    23
  • 19
    23
  • 7
    8
  • 3
    23
  • 21
    23
Question 6
6.
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
  • 7
    8
  • 0
  • 2
    9
  • 1
    8
Question 7
7.
A carton consist of 66 shirts of which 51 are good, 12 have minor defects and 3 have major defects. Venkat, a trader, will only accept the shirts which are good, but Vimala, 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 Vimala?
  • 21
    22
  • 10
    11
  • 22
    23
  • 1
  • 1
    22
Question 8
8.
A die is thrown 50 times. Prime numbers appeared on the upper face 20 times. If a die is thrown at random, what is the probability of getting a prime number?
  • 2
    5
  • 1
    2
  • 1
    5
  • 3
    5
Question 9
9.
One card is drawn at random from a well shuffled deck of 52 cards. What is the probability that the card drawn is '6' of black suit ?
  • 1
    26
  • 3
    13
  • 1
    13
  • 1
    4
  • 1
    52
Question 10
10.
    • On a particular day, at a crossing in a city, the various types of 140 vehicles going past during a time-interval were observed as under:
    • Type of Vehicle
      Two-wheeler
      Three-wheeler
      Four-wheeler
      Frequency
      30
      40
      70
    • Out of these vehicles, if one is choosen at random, what is the probability that the choosen vehicle is a 'Three-wheeler' ?
  • 5
    7
  • 2
    7
  • 1
    7
  • 3
    7
  • 3
    8