Advertisements
Advertisements
प्रश्न
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?
उत्तर
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`
संबंधित प्रश्न
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a spade.
Three coins are tossed together. Find the probability of getting at least one head and one tail
A card is drawn at random from a pack of 52 cards. Find the probability that card drawn is jack
A bag contains 5 black, 7 red and 3 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is not black
One card is drawn from a well shuffled deck of 52 cards. Find the probability of getting a queen of black suit
In a class, there are 18 girls and 16 boys. The class teacher wants to choose one pupil for 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 boy?
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears a number divisible by 5.
A circle with diameter 20 cm is drawn somewhere on a rectangular piece of paper with length 40 cm and width 30 cm. This paper is kept horizontal on table top and a dice, very small in size, is dropped on the rectangular paper without seeing towards it. If the dice falls and lands on the paper only, find the probability that it will fall and land outside the circle.
There are six cards in a box, each bearing a number from 0 to 5. Find the probability of the following event, that a card drawn show, number less than 1.
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 – red.
Tickets numbered 2, 3, 4, 5, ..., 100, 101 are placed in a box and mixed thoroughly. One ticket is drawn at random from the box. Find the probability that the number on the ticket is a number which is a perfect square.
Which of the following cannot be the probability of an event?
A bag contains 3 white, 4 red and 5 black balls. One ball is drawn at random. What is the probability that the ball drawn is neither black nor white?
It is known that a bax of 600 electric bulbs contain 12 defective bulbs. One bulb is taken out at random from this box. What is the probability that it is a non-defective bulb?
Two coins are tossed once. Find the probability of getting 2 heads.
A card is selected from a deck of 52 cards. The probability of its being a red face card is ______.
All the jacks, queens and kings are removed from a deck of 52 playing cards. The remaining cards are well shuffled and then one card is drawn at random. Giving ace a value 1 similar value for other cards, find the probability that the card has a value less than 7
A lot consists of 48 mobile phones of which 42 are good, 3 have only minor defects and 3 have major defects. Varnika will buy a phone if it is good but the trader will only buy a mobile if it has no major defect. One phone is selected at random from the lot. What is the probability that it is acceptable to the trader?
At a fete, cards bearing numbers 1 to 1000, one number on one card, are put in a box. Each player selects one card at random and that card is not replaced. If the selected card has a perfect square greater than 500, the player wins a prize. What is the probability that the first player wins a prize?
From a well-shuffled deck of 52 playing cards, a card is drawn at random. What is the probability of getting a red queen?