Advertisements
Advertisements
Question
A bag contains 5 white and 7 red balls. One ball is drawn at random. What is the probability that ball drawn is white?
Advertisements
Solution
\[\text{ Number of white balls } = 5\]
\[\text{ Number of red balls }= 7\]
\[\text{ Total number of balls }= 5 + 7 = 12\]
\[ \therefore \text{ The total number of cases }= 12\]
\[\text{A gain, there are 5 white balls . Therefore, the number of favourable outcomes is 5 }. \]
\[ \therefore P\left( \text{ the drawn ball is white }\right) = \frac{\text{ Number of favourable cases }}{\text{ Total number of cases }} = \frac{5}{12}\]
RELATED QUESTIONS
List the outcomes you can see in this experiment.
Tossing two coins together
Tell whether the given is certain to happen, impossible, can happen but not certain.
You are older today than yesterday.
In a simultaneous throw of a pair of dice, find the probability of getting:
a sum greater than 9
In a simultaneou throw of a pair of dice, find the probability of getting:
an even number on first
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
neither an ace nor a king
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:
not 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
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:
black
The probability of an event which is certain to happen is ______.
What is the probability of the sun setting tomorrow?
