Advertisements
Advertisements
प्रश्न
A die is thrown. Find the probability of getting:
a prime number
Advertisements
उत्तर
\[\text{ When a die is thrown, the possible outcomes are 1, 2, 3, 4, 5 and 6 } . \]
\[\text{ Thus, the sample space will be as follow }: \]
\[S = \left\{ 1, 2, 3, 4, 5, 6 \right\}\]
\[\text{ Let A be the event of getting a prime number } . \]
\[\text{ There are 3 prime numbers (2, 3 and 5) in the sample space } . \]
\[\text{ Thus, the number of favourable outcomes is 3 . \]
\[Hence, the probability of getting a prime number is as follow }: \]
\[P\left( A \right) = \frac{\text{ Number of favourable outcomes }}{\text{ Total number of outcomes }} = \frac{3}{6} = \frac{1}{2}\]
APPEARS IN
संबंधित प्रश्न
When a die is thrown, list the outcome of an event of getting a number greater than 5.
Tell whether the given is certain to happen, impossible, can happen but not certain.
The next traffic light seen will be green.
There are 6 marbles in a box with numbers from 1 to 6 marked on each of them.
What is the probability of drawing a marble with number 5?
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
the seven of clubs
A bag contains 5 red marbles, 8 white marbles, 4 green marbles. What is the probability that if one marble is taken out of the bag at random, it will be
not green
When two dice are rolled:
List the outcomes for the event that total is less than 5.
What is the probability of choosing a vowel from the alphabets?
The probability of an event which is certain to happen is ______.
Rohit collected the data regarding weights of students of his class and prepared the following table:
| Weight (in kg) | 44 – 47 | 48 – 51 | 52 – 55 | 56 – 60 |
| Number of Students | 3 | 5 | 25 | 7 |
A student is to be selected randomly from his class for some competition. The probability of selection of the student is highest whose weight is in the interval ______.
Classify the following events:
A ball thrown up in the air will fall down after some time.
