Question
A bag contains 5 violet, 16 blue and 7 grey balls. Two
balls are randomly drawn from the bag, what is the probability that a violet and a grey ball are drawn?Solution
The probability that a violet and a grey ball are drawn = (5C1 × 7C1)/28C2 = (5 × 7) / 378 = 35 / 378 = 5/54
More Probability Questions
What will come in place of the question mark (?) in the following series?
12, 13, 27, ?, 329, 1646
48 49 45 54 ? 63 27
...7 29 61 ? 211 349
...660, 653, 639, 618, 590, ?
What will come in place of the question mark (?) in the following series?
111, 109, 115, ?, 211, -509
10 11 12 20 24 ?
18, 30, 54, 90, 138, ?
What will come in place of the question mark (?) in the following series?
206, 187, ?, 157, 146, 139
1 1 4 ? 280 3640
...64, 79, 109, 169, 289, ?
Relevant for Exams:
