Advertisements
Advertisements
प्रश्न
A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is:
red
उत्तर
\[\text{ Number of red balls } = 3\]
\[\text{ Number of black balls } = 5\]
\[\text{ Total number of balls }= 3 + 5 = 8\]
\[\text{ Let A be the event of drawing a red ball } . \]
\[ \therefore P\left( A \right) = \frac{\text{ Number of favourable outcomes }}{\text{ Total number of outcomes }} = \frac{3}{8}\]
APPEARS IN
संबंधित प्रश्न
Tell whether the given is certain to happen, impossible, can happen but not certain.
A die when tossed shall land up with 8 on top.
In a simultaneou throw of a pair of dice, find the probability of getting:
a doublet of odd numbers
Three coins are tossed together. Find the probability of getting:
exactly two heads
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
a ten
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
jack
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
the seven of clubs
Classify the following statements under appropriate headings.
- Getting the sum of angles of a triangle as 180°.
- India winning a cricket match against Pakistan.
- Sun setting in the evening.
- Getting 7 when a die is thrown.
- Sun rising from the west.
- Winning a racing competition by you.
| Certain to happen | Impossible to happen | May or may not happen |
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 ______.
When a coin is tossed, there are 2 possible outcomes.
The letters written on paper slips of the word MEDIAN are put in a bag. If one slip is drawn randomly, what is the probability that it bears the letter D?
