Class VII

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
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
What is the median of the following set of numbers? {12,8,13,4,7,6,3,3,15}
  1. 12
  2. 8
  3. 7
  4. 7.5
Two numbers whose sum is 67 and difference is 3, numbers are
  1. 33 and 34
  2. 32 and 35
  3. 34 and 56
  4. 6 and 15
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
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