Class VII

A bag contains 15 balls of which x are red, probability of getting a red ball at random from bag is
  1. x⁄14
  2. x⁄16
  3. x⁄15
  4. 15⁄x
A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
  1. 10/21
  2. 11/21
  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
What is the range of the following set of data? { 2,5,2,8,45,8,17,9,16}
  1. 43
  2. 45
  3. 15
  4. None of the above
Median of 7, 6, 4, 8, 2, 5, 11 is
  1. 6
  2. 12
  3. 11
  4. 5
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