Advertisements
Advertisements
प्रश्न
A coin is tossed. What is the probability of getting:
a tail?
उत्तर
On tossing a coin once,
Number of possible outcome = 2
Favourable outcome getting a tail = 1
⇒ number of Favourable outcome = 2
∴ P(E) = `"Number of Favourable outcome"/"Number of all possible outcome"`
= `1/2`
APPEARS IN
संबंधित प्रश्न
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 game consist of tossing a one-rupee coin 3 times and noting the outcome each time. Ramesh will win the game if all the tosses show the same result, (i.e. either all thee heads or all three tails) and loses the game otherwise. Find the probability that Ramesh will lose the game.
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.`
Two dice are thrown together. The probability of getting the same number on both dice is.
A black die and a white die are thrown at the same time. Write all the possible outcomes. What is the probability?
that the numbers obtained have a product less then 16.
In a bag there are 44 identical cards with figure of circle or square on them. There are 24 circles, of which 9 are blue and rest are green and 20 squares of which 11 are blue and rest are green. One card is drawn from the bag at random. Find the probability that it has the figure of
In a single throw of a die, the probability of getting a multiple of 3 is
A box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a prime number less than 23, 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.
17 cards numbered 1, 2, 3, 4, .... ,17 are put in a box and mixed thoroughly. A card is drawn at random from the box. Find the probability that the card drawn bears an odd number.
A bag contains 4 white balls, 5 red balls, 2 black balls and 4 green balls. A ball is drawn at random from the bag. Find the probability that it is neither red nor green.
A die is thrown, find the probability of getting:
a number greater than 4
Three identical coins are tossed together. What is the probability of obtaining:
exactly one head?
You are walking along a street. If you just choose a stranger crossing you, what is the probability that his next birthday will fall on a Sunday?
Ram put some buttons on the table. There were 4 blue, 7 red, 3 black and 6 white buttons in all. All of a sudden, a cat jumped on the table and knocked out one button on the floor. What is the probability that the button on the floor is blue?
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?
In a throw of a dice, the probability of getting an even number is the same as that of getting an odd number.
A dice is rolled once. What is the probability that the number on top will be a multiple of 3
Sonia picks up a card from the given cards.
Calculate the probability of getting a G card
Three coins are tossed simultaneously. What is the probability of getting at least one head?