A bag has balls of three colours. It has 8 red balls, x green balls and y blue balls, If probability of picking one green ball and that of picking one b...
In a lottery, there are 11 prizes and 22 blanks. A lottery is drawn at random. What is the probability of getting a prize?
...The probability of selecting a rotten egg randomly from a basket of 250 eggs is 0.2. What is the number of rotten eggs in the basket?
Integers 11, 12, 13, 14 are written on 4 cards they are well shuffled. Two cards are taken at random without replacement. What is the probability that t...
Tom and Jerry throw alternatively a pair of dice. Tom wins if he throws 8 before Jerry throws 7 and Jerry wins if he throws 7 before Tom throws 8. Find...
A bag contains 13 white and some black balls. If the probability of drawing a black ball from the bag is twice that of drawing a white ball, find the nu...
A card is drawn randomly from a collection of total face cards. What is the probability that the drawn card is a jack?
In a Polly bag, the distribution of red, white, and yellow rubber bands is in the ratio 7:3:8. Suppose the yellow rubber bands were reduced by 35 and th...
In a group of artists, there are 10 dancers and 8 singers. If four artists are to be selected at random, what is the probability that 2 dancers and 2 si...
A bag contains 6 balls of which 3 are red and 3 are black. They are drawn successively without replacement. What is the probability that colors are alt...
