One pencil is randomly selected from a case containing 3 red, 4 green, 2 black and 6 blue pencils. what is the probability of a green pencil being chosen?

First off, you add the total amount of pencils which is as follows:

3+4+2+6=15

There are 15 pencils

There are 4 green pencils so the comparison/probability is equivalent to the following:

4:15,  , 26% 

This a very hard question about this place and this company does the right thing and the company always makes you think you can do what black

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle