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:
black?
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 outcomes of an event of getting a prime number.
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? What is the probability of getting a non blue sector?
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
other than an ace
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
a heart
If we have 15 boys and 5 girls in a class which carries a higher probability? Getting a copy belonging to a boy or a girl. Can you give it a value?
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?
Following cards are put facing down:
| A | E | I | O | U |
What is the chance of drawing out A or I?
Classify the following events:
Getting a number less than 1 on throwing a die.
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.
