ProbabilityHard
Question
An urn contains nine balls of which three are red, four are blue and two are green. Three balls are drawn at random without replacement from the urn. The probability that the three balls have different colour is
Options
A.
B.
C.
D.
Solution
n(S) = 9C3
n(E) = 3C1 × 4C1 × 2C1
Probability =
n(E) = 3C1 × 4C1 × 2C1
Probability =
Create a free account to view solution
View Solution FreeMore Probability Questions
The mean and variance of a random variable having a binomial distribution are 4 and 2 respectively, then P (X = 1) is...The probability that a leap year will have 52 Sundays is-...A box contains 25 tickets numbered 1, 2,....25. If two tickets are drawn at random then the probability that the product...A cube is thrown 6 times, then probability of getting the digits 2 and 4 exactly three times each is-...A card is drawn from a well shuffled pack of 52 cards. Its probability of being an ace or a king or a queen or a jack is...