Advertisements
Advertisements
प्रश्न
Five cards − the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random.
If the queen is drawn and put a side, what is the probability that the second card picked up is (a) an ace? (b) a queen?
उत्तर
Five cards-the ten, jack, queen, king and ace of diamond are well shuffled with their face downwards of cards. One card is drawn at random.
When queen is drawn and left aside.
Hence Total number of cards left is 4
(a) Total number of ace card is 1
We know that PROBABILITY = `"Number of favourable event"/"Total number of event"`
Hence probability that the card taken out is an ace is equal to `1/4`
Total numbers of queen is 0
We know that PROBABILITY = `"Number of favourable event"/"Total number of event"`
Hence probabilities that card taken out is queen =0
APPEARS IN
संबंधित प्रश्न
The probability of selecting a red ball at random from a jar that contains only red, blue and orange balls is 1/4. The probability of selecting a blue ball at random from the same jar 1/3. If the jar contains 10 orange balls, find the total number of balls in the jar.
Two different dice are tossed together. Find the probability
(i) that the number on each die is even.
(ii) that the sum of numbers appearing on the two dice is 5.
A box consists of 100 shirts of which 88 are good, 8 have minor defects and 4 have major defects. Ramesh, a shopkeeper will buy only those shirts which are good but 'Kewal' another shopkeeper will not buy shirts with major defects. A shirt is taken out of the box at random. What is the probability that
(i) Ramesh will buy the selected shirt?
(ii) 'Kewal' will buy the selected shirt?
Rahim tosses two different coins simultaneously. Find the probability of getting at least one tail.
Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is a prime number less than 20.
A box contains cards bearing numbers from 6 to 70. If one card is drawn at random from the box, find the probability that it bears
(i) a one digit number.
(ii) a number divisible by 5.
(iii) an odd number less than 30.
(iv) a composite number between 50 and 70.
A black die and a white die are thrown at the same time. Write all the possible outcomes. What is the probability? that the product of numbers appearing on the top of the dice is less than 9.
A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is
A game of chance consists of spinning an arrow which is equally likely to come to rest pointing to one of the numbers 1, 2, 3,..., 12 as shown in the figure. What is the probability that it will point to a number which is a multiple of 5?
A jar contains 24 marbles. Some of these are green and others are blue. If a marble is drawn at random from the jar, the probability that it is green is `2/3`. Find the number of blue marbles in the jar.
A die is thrown once. The probability of getting an even number is
Three coins are tossed simultaneously. What is the probability of getting exactly two heads?
A balloon vendor has 2 red, 3 blue and 4 green balloons. He wants to choose one of them at random to give it to Pranali. What is the probability of the event that Pranali gets, a blue balloon
Find If A If tan 2A = cot (A-24°)
From 10 identical cards, numbered 1, 2, 3, ……, 10, one card is drawn at random. Find the probability that the number on the card drawn is a multiple of
2
Two dice are thrown at the same time. Find the probability that the sum of the two numbers appearing on the top of the dice is: 12
Two dice are rolled, find the probability that the sum is equal to 1
Which of the following is not a random experiment?
The total number of outcomes when a coin is tossed is ______.
Ritwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is `2/9`. If the total number of balls in the bag is 36, find the number of yellow balls.
