PROBABILITY
1. There are 30 cards of the same size in a bag in which the
numbers 1 to 30 are written. One card is taken out from
the bag at random. Find the probability that the number
on the selected card is not divisible by 3.
2. The probability of drawing an ace or a king from a
standard deck of 52 cards is
3. If an event cannot occur then its probability is
4. A letter is chosen at random from the letters of the word
ASSOCIATION. Find the probability that the chosen letter
is a vowel.
5. The probability of getting a prime number, when a die is
thrown once, is
6. A card is drawn at random from a pack of 52 cards. Find
the probability that the card drawn is neither a heart nor a
king
7. There are 20 boys and 15 girls in a class. A student is
chosen as leader at random. The probability that the
leader is a boy is
8. A card is drawn at random from a pack of 52 cards. Find
the probability that the card drawn is spade or an ace
9. A letter is chosen at random from the word
MATHEMATICS. What is the probability that it will be a
vowel?
10. One card is drawn from a well-shuffled deck of 52
cards. Find the probability of getting :
1. a non-face card,
2. a black king.
, 11. Two dice are thrown simultaneously. The probability that
the sum of the numbers appearing on the dice is 1 is
12. If a die is thrown, the probability of getting a number
less than 3 & greater than 2 is
13. Probability of an impossible event is
14. Three coins are tossed simultaneously. What is the
probability of getting
i. at least one head?
ii. exactly two tails?
iii. at most one tail?
15. Two dice are rolled together. What is the probability of
getting a sum greater than 10?
16. Two dice are thrown together. The probability of getting the
same number on both dice is
17. One ticket is drawn at random from a bag containing tickets
numbered 1 to 40. The probability that the selected ticket has a
number which is a multiple of 5 is
18. Two coins are tossed together. The probability of
getting atmost two heads, is:
19. Two customers Rahul and Neha are visiting a
particular shop in the same week (Tuesday to Saturday).
Each is equally likely to visit the shop on any one day as
on another. What is the probability that both will visit the
shop on different days?
1. There are 30 cards of the same size in a bag in which the
numbers 1 to 30 are written. One card is taken out from
the bag at random. Find the probability that the number
on the selected card is not divisible by 3.
2. The probability of drawing an ace or a king from a
standard deck of 52 cards is
3. If an event cannot occur then its probability is
4. A letter is chosen at random from the letters of the word
ASSOCIATION. Find the probability that the chosen letter
is a vowel.
5. The probability of getting a prime number, when a die is
thrown once, is
6. A card is drawn at random from a pack of 52 cards. Find
the probability that the card drawn is neither a heart nor a
king
7. There are 20 boys and 15 girls in a class. A student is
chosen as leader at random. The probability that the
leader is a boy is
8. A card is drawn at random from a pack of 52 cards. Find
the probability that the card drawn is spade or an ace
9. A letter is chosen at random from the word
MATHEMATICS. What is the probability that it will be a
vowel?
10. One card is drawn from a well-shuffled deck of 52
cards. Find the probability of getting :
1. a non-face card,
2. a black king.
, 11. Two dice are thrown simultaneously. The probability that
the sum of the numbers appearing on the dice is 1 is
12. If a die is thrown, the probability of getting a number
less than 3 & greater than 2 is
13. Probability of an impossible event is
14. Three coins are tossed simultaneously. What is the
probability of getting
i. at least one head?
ii. exactly two tails?
iii. at most one tail?
15. Two dice are rolled together. What is the probability of
getting a sum greater than 10?
16. Two dice are thrown together. The probability of getting the
same number on both dice is
17. One ticket is drawn at random from a bag containing tickets
numbered 1 to 40. The probability that the selected ticket has a
number which is a multiple of 5 is
18. Two coins are tossed together. The probability of
getting atmost two heads, is:
19. Two customers Rahul and Neha are visiting a
particular shop in the same week (Tuesday to Saturday).
Each is equally likely to visit the shop on any one day as
on another. What is the probability that both will visit the
shop on different days?
