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RD Chapter 13 Probability Ex 13.1 Solutions

Question - 11 : - A bag contains 6 red, 8 black and 4 white balls. A ball is drawn at random. What is the probability that ball drawn is not black?

Answer - 11 : -


Question - 12 : - A bag contains 5 white and 7 red balls. One ball is drawn at random. What is the probability that ball drawn is white ?

Answer - 12 : -


Question - 13 : - Tickets numbered from 1 to 20 are mixed up and a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 7?

Answer - 13 : -


Question - 14 : - In a lottery there are 10 prizes and 25 blanks. What is the probability of getting a prize ?

Answer - 14 : -


Question - 15 : - If the probability of winning a game is 0.3, what is the probability of loosing it ?

Answer - 15 : -


Question - 16 : -
A bag contains 5 black, 7 red and 3 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:
(i) red
(ii) black or white
(iii) not black

Answer - 16 : -


Question - 17 : -
A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:
(i) white
(ii) red
(iii) not black
(iv) red or white [CBSE 2004]

Answer - 17 : -


Question - 18 : -
One card is drawn from a well shuffled deck of 52 cards. Find the probability of getting:
(i) a king of red suit
(ii) a face card
(iii) a red face card
(iv) a queen of black suit
(v) a jack of hearts
(vi) a spade [NCERT]

Answer - 18 : -


Question - 19 : -
Five cards ten, jack, queen, king and an ace of diamonds are shuffled face downwards. One card is picked at I j random.
(i) What is the probability that the card is a queen ?
(ii) If a king is drawn first and put aside, what is the probability that the second card picked up is the (i) ace (ii) king?

Answer - 19 : -


Question - 20 : -
A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is:
(i) red
(ii) black

Answer - 20 : -


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