Advertisements
Advertisements
प्रश्न
A bag contains 6 red, 8 black and 4 white balls. A ball is drawn at random. What is the probability that ball drawn is not black?
Advertisements
उत्तर
\[\text{ Number of red balls } = 6\]
\[\text{ Number of black balls }= 8 \]
\[\text{ Number of white balls } = 4\]
\[\text{ Total number of balls }= 6 + 8 + 4 = 18\]
\[ \therefore \text{ Total number of cases } = 18\]
\[\text{ Again, number of balls that are not black } = 18 - 8 = 10\]
\[\text{ Thus, the number of favourable cases is }10 . \]
\[ \therefore P\left( \text{ the drawn ball is not black }\right) = \frac{\text{ Number of favourable cases }}{\text{ Total number cases }} = \frac{10}{18} = \frac{5}{9}\]
संबंधित प्रश्न
In a simultaneous throw of a pair of dice, find the probability of getting:
a sum greater than 9
In a simultaneous throw of a pair of dice, find the probability of getting:
neither 9 nor 11 as the sum of the numbers on the faces
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
jack
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:
not black
A bag contains 5 red marbles, 8 white marbles, 4 green marbles. What is the probability that if one marble is taken out of the bag at random, it will be
red
When two dice are rolled:
List the outcomes for the event that total is less than 5.
In the previous question, what is the probability of picking up an ace from set (d)?
When a die is thrown, the probability of getting a number less than 7 is ______.
Following cards are put facing down:
\[\boxed{\text{A}}\] \[\boxed{\text{E}}\] \[\boxed{\text{I}}\] \[\boxed{\text{O}}\] \[\boxed{\text{U}}\]
What is the chance of drawing out
- a vowel
- a card marked U
- A or I
- a consonant
Following cards are put facing down:
| A | E | I | O | U |
What is the chance of drawing out a consonant?
