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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:
black?
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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
Numbers 1 to 10 are written on ten separate slips (one number on one slip), kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of.
- Getting a number 6?
- Getting a number less than 6?
- Getting a number greater than 6?
- Getting a 1-digit number?
Tell whether the given is certain to happen, impossible, can happen but not certain.
The next traffic light seen will be green.
A die is thrown. Find the probability of getting:
a prime number
In a simultaneous throw of a pair of dice, find the probability of getting:
a doublet of prime number
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A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
a queen
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
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Numbers 1 to 5 are written on separate slips, i.e one number on one slip and put in a box. Wahida pick a slip from the box without looking at it. What is the probability that the slip bears an odd number?
When a spinner with three colours (Figure) is rotated, which colour has more chance to show up with arrow than the others?
Classify the following events:
Getting a number less than 1 on throwing a die.
