Applied Mathematics for Electrical Engineering (3130908)

BE | Semester3  Topic : conditional probability

Q3 (b) Winter-2019   An urn contains 10 white and 3 black balls, while another urn contains 3 white and 5 black balls. Two balls are drawn from the first urn and put into the second urn and then a ball is drawn from the later. What is the probability that it is a white ball?

4 Marks
 Unit : Basic Probability

Q3 (c ( i )) Winter-2019  
In producing screws, let A mean “screw too slim” and B “screw too small”. Let P(A)=0.1 and let the conditional probability that a slim screw is also too small be P(B/A)=0.2. What is the probability that the screw that we pick randomly from a lot produced will be both too slim and too short?

3 Marks
 Unit : Basic Probability

Q4 (c ( i )) Winter-2019   A person is known to hit the target in 3 out of 4 shots, whereas another person is known to hit the target in 2 out of 3 shots. Find the probability of the target being hit at all when they both try.

3 Marks
 Unit : Basic Probability