Results
#1. A bag contains 20 balls, 8 balls are green, 7 are white and 5 are red. What is minimum number of balls that must be picked up from the bag blind-folded (without replacing any of it) to be assured of picking atleast one ball of each colour? [2000]
#2. In a factory quality assurance test is conducted on various samples for a specific characteristic value of the product. The values and the number of samples are as given in the following table: [1999] Consider the following statements based on the table: 1. The probability that X £ 17 is 0.64 2. The probability that 15 19 < £ X is greater than 0.64 3. The probability that X = 15 is less than 0.22 Which of the above statements is/are not true?
#3. When three coins are tossed together, the probability that all coins have the same face up, is [1997]
#4. In the given figure, if QRS is an equilateral triangle and TQS is an isosceles triangle and x = 47°, then the value of y (in degrees) will be [1997]
#5. Two packs of cards are thoroughly mixed and shuffled and two cards are drawn at random, one after the other. What is the probability that both of them are jacks? [1996]
