Advertisements
Advertisements
Question
The sum of the probabilities of all the elementary events of an experiment is _________.
Solution
The sum of the probabilities of all the elementary events of an experiment is 1.
APPEARS IN
RELATED QUESTIONS
Probability of an event E + Probability of the event ‘not E’ = _______.
- A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?
- Suppose the bulb drawn in (1) is not defective and is not replaced. Now one bulb is drawn at random from the rest. What is the probability that this bulb is not defective?
A die is thrown. Find the probability of getting 2 or 4
In a simultaneous throw of a pair of dice, find the probability of getting a sum more than 7
Three coins are tossed together. Find the probability of getting at least one head and one tail
A and B throw a pair of dice. If A throws 9, find B’s chance of throwing a higher number.
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting the jack of hearts.
A card is drawn at random from a pack of 52 cards. Find the probability that card drawn is a queen
A black die and a white die are thrown at the same time. Write all the possible outcomes. What is the probability of obtaining a total of 10?
From a deck of 52 cards, all the face cards are removed and then the remaining cards are shuffled. Now one card is drawn from the remaining deck. Find the probability that the card drawn is 8 of red color.
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 red ball.
A box contains 30 tickets, bearing only one number from 1 to 30 on each. If one ticket is drawn at random, find the probability of an event that the ticket drawn bears an odd number .
In a game of chance, a spinning arrow comes to rest at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8. All these are equally likely outcomes. Find the probability that it will rest at an odd number.
A die is rolled twice. Find the probability that 5 will come up exactly one time.
A die is thrown 450 times and frequencies of the outcomes 1,2,3,4,5,6 were noted as given in the following table
| outcomes | 1 | 2 | 3 | 4 | 5 | 6 |
| Frequency | 73 | 70 | 74 | 75 | 80 | 78 |
(iii) a number > 4
Apoorv throws two dice once and computes the product of the numbers appearing on the dice. Peehu throws one die and squares the number that appears on it. Who has the better chance of getting the number 36? Why?
Two dice are thrown simultaneously. What is the probability that the sum of the numbers appearing on the dice is a prime number?
The king, queen and jack of clubs are removed from a deck of 52 playing cards and then well shuffled. Now one card is drawn at random from the remaining cards. What is the probability that the card is 10 of hearts?
Cards bearing numbers 3 to 20 are placed in a bag and mixed thoroughly. A card is taken out of the bag at random. What is the probability that the number on the card taken out is an even number?
