Class XII

A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:
  1. . 1 22
  2. 3 22
  3. 2 91
  4. 2 77
In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:
  1. 21 46
  2. 25 117
  3. . 1 50
  4. 3 25
The mean of the numbers obtained on throwing a die having written 1 on three faces, 2 on two faces and 5 on one face is
  1. 5
  2. 4
  3. 2
  4. 1
One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card (Jack, Queen and King only)?
  1. . 1 13
  2. 3 13
  3. 1 4
  4. 9 52
Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:
  1. 3 20
  2. 29 34
  3. 47 100
  4. 13 102
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