Advertisements
Advertisements
Question
An urn contains 10 red and 8 white balls. One ball is drawn at random. Find the probability that the ball drawn is white.
Advertisements
Solution
\[\text{ Number of red balls } = 10\]
\[\text{ Number of white balls }= 8\]
\[\text{ Total number of balls in the urn } = 10 + 8 = 18\]
\[\text{ Therefore, the total number of cases is 18 and the number of favourable cases is 8 }. \]
\[ \therefore P\left( \text{ The ball drawn is white }\right) = \frac{\text{ Number of favourable cases }}{\text{ Total number of cases }} = \frac{8}{18} = \frac{4}{9}\]
APPEARS IN
RELATED QUESTIONS
Find the probability of getting an ace from a well shuffled deck of 52 playing cards.
A box contains pairs of socks of two colours (black and white). I have picked out a white sock. I pick out one more with my eyes closed. What is the probability that it will make a pair?
The probability that it will rain tomorrow is 0.85. What is the probability that it will not rain tomorrow?
In a simultaneous throw of a pair of dice, find the probability of getting:
an even number on one and a multiple of 3 on the other
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:
a red card
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 coin is tossed 200 times and head appeared 120 times. The probability of getting a head in this experiment is ______.
In a school, only 2 out of 5 students can participate in a quiz. What is the chance that a student picked at random makes it to the competition?
It is impossible to get a sum of 14 of the numbers on both dice when a pair of dice is thrown together.
