Question

There are 20 pens some of them are blue and some of them are red in colour a pen is selected at random the probability of getting a blue pen is one third of the probability of getting a Red pen how many blue pen are there?

Answer 1

5 blue pens were there

Answer 2

Answer:

Step-by-step explanation:

Red pens=X

Blue pens=1/3 of X

1/3 *X+X =20

4X/3=20

4X=20*3

X=60/4

X=15

Red pens=15

Blue pens = 1/3 of 15=5