Advertisements
Advertisements
प्रश्न
Two coins are tossed simultaneously. Find the probability of getting at least one head.
उत्तर
s = {HH, HT, TH, TT}
n (s) = 4
A = {HH, HT, TH}
n(A) = 3
`p(A)=(n(A))/(n(S)) = 3/4`
APPEARS IN
संबंधित प्रश्न
Three different coins are tossed together. Find the probability of getting exactly two heads.
A bag contains 25 cards numbered from 1 to 25. A card is drawn at random from the bag. Find the probability that the number on the drawn card is:
(i) divisible by 3 or 5
(ii) a perfect square number
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 an even prime number.
A box contains 5 red marbles, 8 white marbles, and 4 green marbles, One marble is taken out of the box at random. What is the probability that the marble taken out will be red?
Cards numbered 1 to 30 are put in a bag. A card is drawn at random from this bag. Find the probability that the number on the drawn card is a prime number greater than 7
A box contains 20 cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is divisible by 2 or 3
All the black face cards are removed from a pack of 52 cards. The remaining cards are well shuffled and then a card is drawn at random. Find the probability of getting king
Suppose you drop a tie at random on the rectangular region shown in the given figure. What is the probability that it will land inside the circle with diameter 1 m?
Two coins are tossed simultaneously. Find the probability of getting exactly one head.
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?
In a single throw of a die, the probability of getting a multiple of 3 is
If a number x is chosen from the numbers 1, 2, 3, and a number y is selected from the numbers 1, 4, 9. Then, P(xy < 9)
A card is drawn at random from a well-shuffled pack of 52 cards. Find the probability that the drawn card is neither a king nor a queen.
Five cards − the ten, jack, queen, king and ace of diamonds are well shuffled with their faces downwards. One card is then picked up at random. What is the probability that the drawn card is the queeen?
Students of a school were made to stand in rows for drill. If 3 students less were standing in each row, 10 more rows would be required and if 5 students more were standing in each row, then the number of rows would be reduced by 10. Find the number of students participating in the drill.
A coin is tossed. What is the probability of getting:
a head?
A bag contains a black ball, a red ball and a green ball, all the balls are identical in shape and size. A ball is drawn from the bag without looking into it. What is the probability that the ball drawn is:
(i) a red ball
(ii) not a red ball
(iii) a white ball.
On throwing a dice once, the probability of occurence of an even number is `1/2`.
A dice is rolled once. What is the probability that the number on top will be odd
