Advertisements
Advertisements
Question
A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is red?
Solution
Total no. of possible outcomes = 8 {3 red, 5 black}
No. favourable outcomes = 3
Probability of getting a red ball = `"Number of favourable outcomes"/"total number of outcomes"`
= `3/8`
APPEARS IN
RELATED QUESTIONS
A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8 (see the given figure), and these are equally likely outcomes. What is the probability that it will point at
- 8?
- an odd number?
- a number greater than 2?
- a number less than 9?
A card is drawn at random from a pack of 52 cards. Find the probability that card drawn is black and a king
A card is drawn at random from a pack of 52 cards. Find the probability that card drawn is a ten
In a class, there are 18 girls and 16 boys. The class teacher wants to choose one pupil form class monitor. What she does, she writes the name of each pupil on a card and puts them into a basket and mixes thoroughly. A child is asked to pick one card from the basket. What is the probability that the name written on the card is the name of a girl?
Find the probability that a number selected at random from the numbers 1, 2, 3, ..., 35 is a Multiple of 7
A bag contains tickets numbered 11, 12, 13,..., 30. A ticket is taken out from the bag at random. Find the probability that the number on the drawn ticket is a multiple of 7
A box contains loo red cards, 200 yellow cards and 50 blue cards. If a card is drawn at random from the box, then find the probability that it will be a blue card
Three coins are tossed together. Write all the possible outcomes. Now, find the probability of getting at least two heads.
Six faces of a die are as shown below.
If the die is rolled once, find the probability of -‘D’ appears on upper face.
A bag contains 3 red, 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the ball drawn is – either red or white.
A two digit number is to be formed from the digits 0, 1, 2, 3, 4. Repetition of the digits is allowed. Find the probability that the number so formed is a - prime number.
A die is rolled twice. Find the probability that 5 will come up exactly one time.
If P(E) denotes the probability of an event E then
Which of the following cannot be the probability of an event?
1000 families with 2 children were selected randomly , and the following data were recorded :
Number of girls in a family | 0 | 1 | 2 |
Number of families | 333 | 392 | 275 |
Find the probability of a family , having
(ii) 2 girls
A card is drawn from a pack of well - shuffled 52 playing cards . Find the probability that the card drawn is
(iv) an ace or a queen
A bag contains 10 red, 5 blue and 7 green balls. A ball is drawn at random. Find the probability of this ball being a not a blue ball.
A bag contains 24 balls of which x are red, 2x are white and 3x are blue. A ball is selected at random. What is the probability that it is white?
From a well-shuffled deck of 52 playing cards, a card is drawn at random. What is the probability of getting a red queen?
An unbiased die is thrown. The probability of getting an odd prime number is ______.