Advertisements
Advertisements
प्रश्न
A box consists of 100 shirts of which 88 are good, 8 have minor defects and 4 have major defects. Ramesh, a shopkeeper will buy only those shirts which are good but 'Kewal' another shopkeeper will not buy shirts with major defects. A shirt is taken out of the box at random. What is the probability that
(i) Ramesh will buy the selected shirt?
(ii) 'Kewal' will buy the selected shirt?
उत्तर
Total number of shirts = 100
Number of good shirts = 88
Number of shirts with minor defects = 8
Number of shirts with major defects = 4
(i) It is given that Ramesh will buy only good shirts.
∴ P(Selected shirt is good shirt) = `88/100=22/25`
⇒ Probability that Ramesh will buy the selected shirt = `22/25`
(ii) It is given that Kewal will not buy shirts with major defects. So, Kewal will buy good shirts and shirts with minor defects.
Total number of good shirts and shirts with minor defects = 88 + 8 = 96
∴ P(Selected shirt is good or shirt with minor defect)= `96/100=24/25`
⇒ Probability that Kewal will buy the selected shirt = `24/25`
APPEARS IN
संबंधित प्रश्न
There are three boys and two girls. A committee of two is to be formed. Find the probability of events that the committee contains :
a) At least one girl.
b) One boy and one girl
c) Only boys
Three different coins are tossed together. Find the probability of getting exactly two heads.
Two dice are thrown. Find the probability of getting :
1) The sum of the numbers on their upper faces is at least 9.
2) The sum of the numbers on their upper faces is 15.
3) The number on the upper face of the second die is greater than the number on the upper face of the first die.
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)
A Group consists of 12 persons, of which 3 are extremely patient, other 6 are extremely honest and rest are extremely kind. A person from the group is selected at random. Assuming that each person is equally likely to be selected, find the probability of selecting a person who is (i) extremely patient (ii) extremely kind or honest.
Which of the above values you prefer more?
Two dice are rolled once. Find the probability of getting such numbers on the two dice, whose product is 12.
A card is drawn at random from a well shuffled pack of 52 playing cards.
Find the probability that the card drawn is a spade.
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 not red?
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.
What is the probability that the card is the queen?
The king, queen and jack of clubs are removed form a deck of 52 playing cards and the remaining cards are shuffled. A card is drawn from the remaining cards. Find the probability of getting a card of a queen of diamond.
The probability of throwing a number greater than 2 with a fair dice is
From the letters of the word ''MOBILE", a letter is selected. The probability that the letter is a vowel, is
The probability that a non-leap year has 53 sundays, is
A two digit number is to be formed using the digits 0, 1, 2, 3. Repetition of the digits is allowed. Find the probability that a number so formed is a prime number.
A bag contains 4 white balls, 5 red balls, 2 black balls and 4 green balls. A ball is drawn at random from the bag. Find the probability that it is red or white.
A box contains a certain number of balls. On each of 60% balls, letter A is marked. On each of 30% balls, letter B is marked and on each of remaining balls, letter C is marked. A ball is drawn from the box at random. Find the probability that the ball drawn is:
- marked C
- A or B
- neither B nor C
in winter, the temperatures at a hill station from Monday to Friday are in A.P. The sum of the temperatures of Monday, Tuesday and Wednesday is 0° C and the sum of the temperatures of Thursday and Friday is 15° C. Find the temperature of each of the five days.
A die is thrown, find the probability of getting:
a prime number
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.
A dice is rolled once. What is the probability that the number on top will be greater than 5
