Advertisements
Advertisements
प्रश्न
A coin is tossed. What is the probability of getting:
a head?
उत्तर
On tossing a coin once,
Number of possible outcome = 2
a head
Similarly, Favourable outcome of getting a head = 1
But the number of possible outcomes = 2
∴ P(E) = `"Number of Favourable outcome"/"Number of all possible outcome"`
= `1/2`
APPEARS IN
संबंधित प्रश्न
A card is drawn at random from a well-shuffled deck of playing cards. Find the probability that the card drawn is a card of spade or an ace.
The probability that a number selected at random from the numbers 1, 2, 3, ..., 15 is a multiple of 4, is
`(A)4/15`
`(B)2/15`
`(C)1/5`
`(D)1/3`
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.
Two dice are rolled once. Find the probability of getting such numbers on the two dice, whose product is 12.
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
Red queens and black jacks are removed from a pack of 52 playing cards. A card is drawn at random from the remaining cards, after reshuffling them. Find the probability that the card drawn is a queen
A bag contains 5 red, 8 green and 7 white balls, One ball is drawn at random from the bag. What is the probability of getting a white ball or a green ball?
In a single throw of a die, the probability of getting a multiple of 3 is
A card is drawn at random from a well-shuffled pack of 52 cards. Find the probability of getting a queen or a jack.
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.
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 an even number ?
A lot consists of 144 ballpoint pens of which 20 are defective and others good. Tanvy will buy a pen if it is good, but will not buy it if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that she will not buy it?
Two coins are tossed together . what is the probabilty of getting different faces on the coins ?
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 not a black ball.
Three identical coins are tossed together. What is the probability of obtaining:
exactly one head?
Two dice are rolled, find the probability that the sum is less than 13
The total number of events of throwing 10 coins simultaneously is ____________.
What is the probability that the minute and hour hands of a clock will form an acute angle at any given time?
Each outcome or a collection of outcomes in an experiment makes an ______.
A bag contains 25 cards, numbered through 1 to 25. A card is drawn at random. What is the probability that the number on the card drawn is multiple of 5?
