Advertisements
Advertisements
प्रश्न
Cards bearing numbers 2, 3, 4, ..., 11 are kept in a bag. A card is drawn at random from the bag. The probability of getting a card with a prime number is
पर्याय
A. `1/2`
B. `2/5`
C. `3/10`
D. `5/9`
उत्तर
Number on the cards are 2, 3, 4, … , 11.
Sample space associated with the experiment, S = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11}
∴Total number of outcomes = 10
Let A be the event of drawing a card with a prime number.
The cards with prime number are 2, 3, 5, 7 and 11.
Number of outcomes in favour of event A = 5
`therefore \text{Requried probablity =P(A)}=(text{Number of outcomes in favour of A})/(text{ Total number of outcomes i})5/10=1/2`
Hence, the correct answer is A.
APPEARS IN
संबंधित प्रश्न
Three different coins are tossed together. Find the probability of getting exactly two heads.
Cards marked with number 3, 4, 5, ...., 50 are placed in a box and mixed thoroughly. A card is drawn at random form the box. Find the probability that the selected card bears a perfect square number.
In a single throw of a pair of different dice, what is the probability of getting a total of 9 or 11?
A bag contains cards numbered from 1 to 49. A card is drawn from the bag at random, after mixing the cards thoroughly. Find the probability that the number on the drawn card is a perfect square.
In fig. 7 is shown a disc on which a player spins an arrow twice. The fraction `a/b` is formed, where 'a' is the number of sector on which arrow stops on the first spin and 'b' is the number of the sector in which the arrow stops on second spin. On each spin, each sector has equal chance of selection by the arrow. Find the probability that the fraction `a/b>1.`
All red face cards are removed from a pack of playing cards. The remaining cards are well shuffled and then a card is drawn at random from them. Find the probability that the drawn card is a face card and
One card is drawn at random from a well shuffled deck of 52 cards. What is the probability of getting an ace?
A number is chosen at random from the number –3, –2, –1, 0, 1, 2, 3. What will be the probability that square of this number is less then or equal to 1?
The probability of an impossible event is
A two digit number is to be formed using the digits 0, 1, 2, 3. Repetition of the digits is allowed. Find the probability that a number so formed is a prime number.
A card is drawn from a well-shuffled pack of 52 cards. Find the probability of getting a black king.
A box contains 80 discs, which are numbered from 1 to 80. If one disc is drawn at random from the box, find the probability that it bears a perfect square number.
Two dice are rolled simultaneously, write down the total number of possible outcomes.
A bag contains 3 white, 5 black, and 2 red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball drawn is a white ball.
Two coins are tossed together. Find the probability of getting: exactly one tail
The total number of events of throwing 10 coins simultaneously is ____________.
A letter of English alphabets is chosen at random. Determine the probability that the letter is a consonant.
Rohan and Shalu are playing with 5 cards as shown in the figure. What is the probability of Rohan picking a card without seeing, that has the number 2 on it?
A coin is tossed two times. The number of possible outcomes is ______.
At a Birthday Party, the children spin a wheel to get a gift. Find the probability of any toy except a chocolate
