Question

3) A drawer contains 10 blue pens, and 10 red pens. Without looking, Mrs.

Stanton is going to take one pen from a drawer, use it, and then put it back in
the drawer. Then he is going to take another pen from the drawer to use. What
is the probability of Mrs. Stanton taking a red pen first and then taking a blue
pen? P(red, then blue)?

Answer 1

The probability is 1/2 because he has an even amount of both colored pens so there are 50% blue and 50% red the odds are like flipping a coin in the air. There is a 50% chance that it will land on either heads or tails in other words 50/100 which is also 1/2 same thing applies with the pens.

Answer: 1/2