A box contains 15 resistors. Ten of them are labeled 50 ? and the other five are labeled 100 ?.

a. What is the probability that the first resistor is 100 ??
b. What is the probability that the second resistor is 100 ?, given that the first resistor is 50 ??
c. What is the probability that the second resistor is 100 ?, given that the first resistor is 100 ??


(a) 5?15

(b) Given that the first resistor is 50?, there are 14 resistors remaining of which 5 are 100?. Therefore P(2nd is 100?|1st is 50?) = 5?14.

(c) Given that the first resistor is 100?, there are 14 resistors remaining of which 4 are 100?. Therefore P(2nd is 100?|1st is 100?) = 4?14

Trades & Technology

You might also like to view...

Why were so many Americans anxious about the economic future of the nation at the conclusion of World War II? How would your level of anxiety about the economic future of the nation and your personal economic security vary if you were a woman, a veteran, a union member, and African American? Why did these fears, in many cases but not all, prove groundless?

What will be an ideal response?

Trades & Technology

The standard welding symbol, which is shaped like a right triangle with equal sides adjacent to that angle, represents a ____ weld.

A. bevel B. square C. V D. triangular E. none of the above

Trades & Technology

On a P-T chart for a zeotropic refrigerant, the liquid pressure column represents the _____

a. boiling point b. glide point c. bubble point d. dew point

Trades & Technology

On a duct with dimendions of 30" x 18", what does the 30" refer to?

Fill in the blank(s) with the appropriate word(s).

Trades & Technology