Advertisements
Advertisements
प्रश्न
A bag contains cards numbered from 1 to 49. A card is drawn from the bag at random, after mixing the card thoroughly. Find the probability that the number on the drawn card is a perfect square
उत्तर
The cards are numbered from 1 to 49.
∴ Total number of outcomes = 49
The perfect square numbers from 1 to 49 are 1, 4, 9, 16, 25, 36 and 49.
So, the favourable number of outcomes are 7.
∴ P(number on the drawn card is a perfect square) =\[\frac{\text{ Favourable number of outcomes }}{\text{ Total number of outcomes }} = \frac{7}{49} = \frac{1}{7}\]
APPEARS IN
संबंधित प्रश्न
The probability of selecting a red ball at random from a jar that contains only red, blue and orange balls is 1/4. The probability of selecting a blue ball at random from the same jar 1/3. If the jar contains 10 orange balls, find the total number of balls in the jar.
In the accompanying diagram a fair spinner is placed at the center O of the circle.
Diameter AOB and radius OC divide the circle into three regions labelled X, Y and Z. If
∠BOC = 45°. What is the probability that the spinner will land in the region X?(See fig)
In fig. 7 is shown a disc on which a player spins an arrow twice. The fraction `a/b` is formed, where 'a' is the number of sector on which arrow stops on the first spin and 'b' is the number of the sector in which the arrow stops on second spin. On each spin, each sector has equal chance of selection by the arrow. Find the probability that the fraction `a/b>1.`
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 red balloon
Two dice are rolled once. Find the probability of getting such numbers on the two dice, whose product is 12.
A bag contains 3 red balls and 5 black balls. A ball is draw at random from the bag. What is the probability that the ball drawn is red?
A bag contains cards numbered from 1 to 49. A card is drawn from the bag at random, after mixing the card thoroughly. Find the probability that the number on the drawn card is an even prime number
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 square.
One card is drawn from a well shuffled deck of 52 playing cards. What is the probability of getting a non-face card?
A card is accidently dropped from a pack of 52 playing cards. The probability that it is an ace is
The probability that a number selected at random from the numbers 1, 2, 3, ..., 15 is a multiple of 4, is
A lot consists of 144 ballpoint pens of which 20 are defective and others good. Tanvy will buy a pen if it is good, but will not buy it if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that she will buy it,
Cards numbered 1 to 30 are put in a bag. A card is drawn at random from the bag. Find the probability that the number on the drawn card is not a perfect square number.
A die is thrown once. Find the probability of getting a number which
lies between 2 and 6.
A bag contains a black ball, a red ball and a green ball, all the balls are identical in shape and size. A ball is drawn from the bag without looking into it. What is the probability that the ball drawn is:
(i) a red ball
(ii) not a red ball
(iii) a white ball.
From 10 identical cards, numbered 1, 2, 3, ……, 10, one card is drawn at random. Find the probability that the number on the card drawn is a multiple of
3
Two dice are thrown at the same time. Find the probability that the sum of the two numbers appearing on the top of the dice is: 12
Two dice are thrown at the same time. Find the probability that the sum of the two numbers appearing on the top of the dice is: less than 12
When a dice is thrown, outcomes 1, 2, 3, 4, 5, 6 are equally ______.
At a Birthday Party, the children spin a wheel to get a gift. Find the probability of getting a ball
