Advertisements
Advertisements
प्रश्न
A die is thrown once. What is the probability of getting a prime number?
उत्तर
GIVEN: A dice is thrown once
TO FIND: Probability of getting a prime number.
Total number on a dice is 6.
Prime numbers on a dice are 2, 3 and 5
Total number of prime numbers on dice is 3
`"We know that PROBABILITY"="Number of favourable event"/"Total number of event"`
`"Hence probability of getting a prime number" = 3/6=1/2`
`"Hence probability of getting a prime number "= 1/2`
APPEARS IN
संबंधित प्रश्न
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 a prime number.
Choose the correct alternative answer for the following question.
A die is rolled. What is the probability that the number appearing on upper face is less than 3 ?
In a class of 42 students in Model High School, 3 students use spectacles.
Fill in the following boxes to find the probability of a students selected
at random is wearing sepctacles.
The total number of students in the class is 42.
∴n(S) = ...... ,
Let the event, a student uses spectacles, be A.
∴ n(A) = ...........
∴ P(A) = ............ ∴ P(A) = ............
Five cards − the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random.
If the queen is drawn and put a side, what is the probability that the second card picked up is (a) an ace? (b) a queen?
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 green colour
A die thrown once. What is the probability of getting a number lying between 2 and 6?
In a single throw of a die, the probability of getting a multiple of 3 is
The probability of guessing the correct answer to a certain test questions is\[\frac{x}{12}\] If the probability of not guessing the correct answer to this question is\[\frac{ 2}{3}\] then x =
From the letters of the word ''MOBILE", a letter is selected. The probability that the letter is a vowel, is
A die is thrown once. The probability of getting a prime number is
The probability that a number selected at random from the numbers 1, 2, 3, ..., 15 is a multiple of 4, 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.
Two different dice are rolled simultaneously. Find the probability that the sum of the numbers on the two dice is 10.
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 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 bag contains 18 balls out of which x balls are red. If two more red balls are put in the bag, the probability of drawing a red ball will be `9/8` times the probability of drawing a red ball in the first case. Find the value of x.
Two coins are tossed together . what is the probabilty of getting different faces on the coins ?
Basketball players John, Vasim, Akash were practising the ball drop in the basket. The probabilities of success for John, Vasim and Akash are `4 /5`, 0.83 and 58% respectively. Who had the greatest probability of success ?
Ritwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is `2/9`. If the total number of balls in the bag is 36, find the number of yellow balls.
