railway RRB Technician Grade 1 Mock Test 2024 Engineering Mathematics Probability and Statistics Basics of Probability
The probability that a contractor gets a plumbing contract is 2 / 3 and the probability that he will not get an electric contract is 5 / 9. If the probability of getting at least one contract is 4 / 5, then the probability that he will get both the contracts is:
1
13 / 45
2
14 / 45
3
16 / 45
4
17 / 45