Advertisements
Advertisements
प्रश्न
A bag contains 3 red balls, 5 black balls and 4 white balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is:
red?
Advertisements
उत्तर
\[\text{ Number of red balls }= 3\]
\[\text{ Number of black balls } = 5 \]
\[\text{ Number of white balls } = 4\]
\[\text{Total number of balls } = 3 + 5 + 4 = 12\]
\[\text{ Therefore, the total number of cases is }12 . \]
\[\text{ Since there are 3 red balls, the number of favourable outcomes is 3 }. \]
\[P\left(\text{ a red ball } \right) = \frac{\text{ Number of favourable cases }}{\text{ Total number of cases }} = \frac{3}{12} = \frac{1}{4}\]
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.
A tossed coin will land heads up.
Tell whether the given is certain to happen, impossible, can happen but not certain.
Tomorrow will be a cloudy day.
In a simultaneous throw of a pair of dice, find the probability of getting:
a sum more than 7
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
a spade
An urn contains 10 red and 8 white balls. One ball is drawn at random. Find the probability that the ball drawn is white.
A bag contains 5 white and 7 red balls. One ball is drawn at random. What is the probability that ball drawn is white?
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
If you have a spinning wheel with 3-green sectors, 1-blue sector and 1-red sector. What is the probability of getting a green sector? Is it the maximum?
Classify the following events:
A ball thrown up in the air will fall down after some time.
