Question

A teacher has a container of pens she will randomly selectone pen from the container

: 5 blue
: 9 blue
: 6 black
What is the probability of selecting a black pen?

1/3 5/6 2/3 7/10 1/6 3/10

The probability of selecting a black pen is ______ and the probability of selecting a pen that is not black is _______. PLS HELP!!!

Answer 1

Probability of getting a black pen = (number of black pens)/(total number of pens)

Once you have that probability, the probability of *not* getting a black pen would simply be 1 - the probability of getting a black pen.

Answer 2

whats the answer then

Answer 3

Please be mindful that the purpose of this site is to teach rather than simply give answers.

Take a look at the problem, how many black pens are there? How many pens in total (adding all the colors together)?

Answer 4

20

Answer 5

???

Answer 6

Good, there are 6 black and 20 total pens so the probability of getting black is 6/20, which is 3/10 simplified.

Now, for the probability of *not* getting a black pen, simply subtract 1 - (3/10) = ?

Answer 7

thx