Class XII

In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
  1. 1 10
  2. 2 5
  3. 2 7
  4. 5 7
In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?
  1. 1 3
  2. 3 4
  3. 7 19
  4. 8 21
Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed 6 times. What are possible values of X?
  1. X = 6, 4, 2, 0
  2. X = 6, 4, 2, 1
  3. X = 6, 3, 2, 1
  4. X = 6, 5, 2, 0
Which of the following conditions do Bernoulli trials satisfy?
  1. finite number of dependent trials
  2. infinite number of dependent trials
  3. infinite number of independent trials
  4. finite number of independent trials
What is the probability of getting a sum 9 from two throws of a dice?
  1. 1 6
  2. 1 8
  3. 1 9
  4. 1 12
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