Question

Tatyana has x + 2 pens in the pocket of her backpack. Samuel has 2x - 1 pens in the pocket of his backpack.
a. Tatyana has 2 blue pens. Find the probability that she pulls out a blue pen
at random.
b. Samuel has x - 3 blue pens. Find the probability that he pulls out a blue pen
at random.
c. Find the probability that both Tatyana and Samuel pull out blue pens
at random.
d. Find the probability that either Tatyana or Samuel pulls out a blue pen
at random.

Answer 1

i am guessing that the answer to the first one is \[\frac{2}{x+2}\]

Answer 2

any idea how to do the second one ?

Answer 3

No clue

Answer 4

Hellllllppppp

Answer 5

If you have 5 pens in your pocket and 3 of them are blue, what is the probability you will pull out a blue pen?

Answer 6

3/5

Answer 7

If you have 2x-1 pens in your pocket and x-3 of them are blue, what is the probability you will pull out a blue pen?

Answer 8

I thought that the second one was x-3/2x-1

Answer 9

you thought correctly. Congratulations.

Answer 10

Would the last one be 2x-1/3x+1 ??

Answer 11

Now for c, find the probability of A and B and for d, find the probability of A or B. You should have formulas for those for independent events.