In: Statistics and Probability
3. A box contains 15 resistors. Ten of them are labeled 50 ohms and the other five are labeled 100 ohms. a. What is the probability that the first resistor is 100 ohms? b. What is the probability that the second resistor is 100 ohms, given that the first resistor is 50 ohms? c. What is the probability that the second resistor is 100ohms, given that the first resistor is 100 ohms?
4. Refer to Exercise 3. Resistors are randomly selected from the
box, one by one, until a 100ohm resistor is selected. a. What is
the probability that the first two resistors are both 50 ohms? b.
What is the probability that a total of two resistors are selected
from the box? c. What is the probability that more than three
resistors are selected from the box?