Advertisements
Advertisements
प्रश्न
A game of chance consists of spinning an arrow which is equally likely to come to rest pointing to one of the numbers 1, 2, 3,..., 12 as shown in the figure. What is the probability that it will point to a prime number ?
उत्तर
The possible outcomes are 1,2, 3,4, 5................12.
Number of all possible outcomes = 12
Out of the given numbers, the prime numbers are 2, 3, 5, 7 and 11.
Let E3 be the event of the arrow pointing at a prime number.
Then, number of favourable outcomes = 5
∴ P (arrow pointing at a prime number) = P( E3) =`5/12`
APPEARS IN
संबंधित प्रश्न
Two different dice are tossed together. Find the probability that the product of the two numbers on the top of the dice is 6.
Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is an odd number.
Three different coins are tossed together. Find the probability of getting at least two heads.
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?
A card is drawn from a well shuffled deck of 52 cards. Find the probability of getting (i) a king of red colour (ii) a face card (iii) the queen of diamonds.
A piggy bank contains hundred 50 paise coins, fifity ₹1 coins, twenty ₹2 coins and ten ₹5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, find the probability that the coin which fell will be of value less than ₹5
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 blue circle and
The probability of an impossible event is
Two different coins are tossed simultaneously. The probability of getting at least one head is
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 black.
A carton consists of 100 shirts of which 88 are good and 8 have minor defects. Rohit, a trader, will only accept the shirts which are good. But Kamal, an another trader, will only reject the shirts which have major defects. One shirt is drawn at random from the carton. What is the probability that it is acceptable to Rohit.
A die is thrown once. The probability of getting an even number is
From a well-shuffled deck of 52 cards, one card is drawn at random. What is the probability of getting a queen?
One card is drawn at random from a well-shuffled deck of 52 cards. What is the probability of getting a 6?
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
A die is thrown once. Find the probability of getting.
(a) a prime number.
(b) an odd number
A letter is chosen from the word ‘PENCIL’ what is the probability that the letter chosen is a consonant?
If the probability of an event is p, the probability of its complementary event will be ______.
In a throw of a dice, the probability of getting an even number is the same as that of getting an odd number.
