A four figure number is formed of the figure 1, 2, 3, 5 with no repetition. The probability that the number is divisible by 5 is
A coin is tossed. If it shows head, we draw a ball from a bag consisting of 3 blue and 4 white balls; if it shows tail we throw a die. Describe the sample space of this experiment.
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears (i) a two-digit number (ii) a perfect square number(iii) a number divisible by 5.
From a pack of 52 cards, two are drawn one by one without replacement. Find the probability that both of them are kings.
A die is thrown, find the probability of following events:
(i) A prime number will appear,
(ii) A number greater than or equal to 3 will appear,
(iii) A number less than or equal to one will appear,
(iv) A number more than 6 will appear,
(v) A number less than 6 will appear.
X speaks truth in 60% and Y in 50% of the cases. Find the probability that they contradict each other narrating the same incident.