Find the probability of getting a number less than 5 in a single throw of a die.

2 One card is drawn from a well-shuffled deck of 52 cards. Find the probability of drawing:
(i) an ace.
(ii) `2' of spades.
(iii) `10' of a black suit 3 17 cards numbered 1, 2, 3, ..., 16, 17 are put in a box and mixed thoroughly. One person draws a card from the box. Find the probability that the number on the card is         
(i) odd.                       
(ii) a prime              
(iii) divisible by 3     
(iv) divisible by 3 and 2 both 4 A die is thrown once. Find the probability of getting
(i) an even number
(ii) a number greater than 3
(iii) a number between 3 and 6 5 A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, find the number of blue balls in the bag.