Advertisements
Advertisements
प्रश्न
Three identical coins are tossed together. What is the probability of obtaining:
all heads?
उत्तर
Total outcomes = 8
i.e. (H,H,H),(H,H,T),(H,T,H),(T,T,T),(T,H,H),(T,T,H),(H,T,T),(T,H,T)
Favourable outcome = i.e. (H,H,H)
∴ P(of getting all heads) = `1/8`
APPEARS IN
संबंधित प्रश्न
In a family of 3 children, the probability of having at least one boy is
`(A)7/8`
`(B)1/8`
`(C)5/8`
`(D)3/4`
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?
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 perfect square number.
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 divisible by 5
A card is drawn from a well-shuffled deck of 52 playing cards. The probability that the card will not be an ace is
A dice is rolled twice. Find the probability that 5 will come up exactly one time
All kings and queens are removed from a pack of 52 cards. The remaining cards are well shuffled and then a card is randomly drawn from it. Find the probability that this card is a black card.
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
The probability of throwing a number greater than 2 with a fair dice is
A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is
It is known that a box of 200 electric bulbs contains 16 defective bulbs. One bulb is taken out at random from the box. What is the probability that the bulb drawn is defective.
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 6 ?
A piggy bank contains hundred 50 p coins, seventy ₹1 coin, fifty ₹2 coins and thirty ₹5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, what is the probability that the coin will not be a ₹5 coin?
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
A die is thrown once. Find the probability of getting a number which is a prime number
A die is thrown once. Find the probability of getting a number which
lies between 2 and 6.
A letter is chosen from the word ‘PENCIL’ what is the probability that the letter chosen is a consonant?
A coin is tossed three times. The number of possible outcomes is ______.
On throwing a dice once, the probability of occurence of an even number is `1/2`.
