Advertisements
Advertisements
प्रश्न
All the jacks, queens and kings are removed from a deck of 52 playing cards. The remaining cards are well shuffled and then one card is drawn at random. Giving ace a value 1 similar value for other cards, find the probability that the card has a value 7
उत्तर
In out of 52 playing cards, 4 jacks, 4 queens and 4 kings are removed, then the remaining cards are left, n(S) = 52 – 3 × 4 = 40.
Let E1 = Event of getting a card whose value is 7
E = Card value 7 may be of a spade, a diamond, a club or a heart
∴ n(E1) = 4
∴ `P(E_1) = (n(E_1))/(n(S)) = 4/40 = 1/10`
APPEARS IN
संबंधित प्रश्न
A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8 (see the given figure), and these are equally likely outcomes. What is the probability that it will point at
- 8?
- an odd number?
- a number greater than 2?
- a number less than 9?
In a simultaneous throw of a pair of dice, find the probability of getting 1 at least once
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a king of red colour.
In a lottery there are 10 prizes and 25 blanks. What is the probability of getting a prize?
Fill in blank:
Probability of an event A + Probability of event ‘not A’ ...........
From a well-shuffled deck of 52 playing-cards, one card is drawn. Find the probability that the card drawn will be a face card of red colour.
Two dice (each bearing numbers 1 to 6) are rolled together. Find the probability that the sum of the numbers on the upper-most faces of two dice is between 5 and 8.
Tickets numbered 2, 3, 4, 5, ..., 100, 101 are placed in a box and mixed thoroughly. One ticket is drawn at random from the box. Find the probability that the number on the ticket is a prime number less than 40.
When a die is thrown, the probability of getting an odd number less than 3 is ______.
A card is drawn from a deck of 52 cards. The event E is that card is not an ace of hearts. The number of outcomes favourable to E is ______.
