Advertisements
Advertisements
प्रश्न
A coin is tossed twice. Find the probability of getting: two tails
उत्तर
Two tails
Possible number of favourable outcomes = 1 (i.e. TT)
Total number of possible outcomes = 4
∴ P(E) = `"Number of favourable outcomes"/"Total number of possible outcomes"`
= `1/4`
APPEARS IN
संबंधित प्रश्न
Two different dice are tossed together. Find the probability :
1) of getting a doublet
2) of getting a sum 10, of the numbers on the two dice.
In the given figure, a square dart board is shown. The length of a side of the larger square is 1.5 times the length of a side of the smaller square. If a dart is thrown and lands on the larger square. What is the probability that it will land in the interior of the smaller square?
A box contains 80 discs which are numbered from 1 to 80. If one disc is drawn at random from the box, find the probability that it bears a perfect square number.
The following table shows the blood-groups of employees in a bank.
Event C is : ‘the blood-group of an employee is AB.’
| Blood - group | A | B | AB | 0 |
| No. of employees | 20 | 40 | 15 | 25 |
If an employee is chosen at random, what is the probability that his blood-group is AB ?
Fill in the following boxes and find the answer
n(S)= ______
n(C)= ______
p(C)=________=_________
A black die and a white die are thrown at the same time. Write all the possible outcomes. What is the probability?
that the difference of the numbers appearing on the top of two dice is 2.
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.
All kings and queens are removed from a pack of 52 cards. The remaining cards are well shuffled and then a card is randomly drawn from it. Find the probability that this card is a black card.
A die is thrown once. What is the probability of getting an odd number?
Two dice are rolled together. Find the probability of getting such numbers on the two dice whose product is 12.
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 number which is a multiple of 5?
A box contains 80 discs, which are numbered from 1 to 80. If one disc is drawn at random from the box, find the probability that it bears a perfect square number.
All red face cards are removed from a pack of playing cards. The remaining cards are well shuffled and then a card is drawn at random from them. Find the probability that the drawn card is a face card.
A die is thrown, then find the probability of the following events:
A is an event: getting a perfect square.
B is an event: getting a prime number.
A coin is tossed. What is the probability of getting:
a tail?
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
2 and 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: less than or equal to 12
In a throw of a dice, the probability of getting an even number is the same as that of getting an odd number.
A dice is rolled once. What is the probability that the number on top will be a factor of 6
Sonia picks up a card from the given cards.
Calculate the probability of getting a Y card
A card is drawn at random from a pack of well shuffled 52 playing cards. Complete the following activity to find the probability that the card drawn is:
Event A: The card drawn is an ace.
Event B: The card drawn is a spade.
Activity: 'S' is the sample space.
∴ n(S) = 52
Event A: The card drawn is an ace.
∴ n(A) = `square`
P(A) = `square` ......(formula)
∴ P(A) = `square/52`
∴ P(A) = `square/13`
Event B: The card drawn is a spade.
∴ n(B) = `square`
P(B) = `(n(B))/(n(S))`
∴ P(B) = `square/4`
