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प्रश्न
A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:
white
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उत्तर
\[\text{ Number of red balls } = 4\]
\[\text{ Number of black balls } = 5\]
\[\text{ Number of white balls } = 6\]
\[\text{ Total number of balls in the bag } = 4 + 5 + 6 = 15\]
\[\text{ Therefore, the total number of cases is } 15 . \]
\[\text{ Let A denote the event of getting a white ball } . \]
\[\text{ Number of favourable outcomes. number of white balls } =6\]
\[P\left( A \right) = \frac{\text{ Number of favourable outcomes }}{\text{ Total number of outcomes }} = \frac{6}{15} = \frac{2}{5}\]
संबंधित प्रश्न
List the outcomes you can see in this experiment.
Spinning a wheel
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 simultaneous throw of a pair of dice, find the probability of getting:
8 as the sum
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:
a heart
A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:
red
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
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.
When a die is thrown, list the outcome of an event of getting not a prime number.
