Question

in a box are 20 inkpens, 50 blue ink pens and30 black ink pens
a.what is the probability of getting a red ink pen
b. what is the probability of getting black ink pens or blue ink pens
c.what is the probability of not getting a red ink pen​

Answer 1

Answer:

see explanation

Step-by-step explanation:

given : red pens =20

blue pens =50

black pens =30

total pens =20+50+30=100

a) probability of getting red ink pen

= no of red pens / total no of pens

=20/100=0.2

b) probability of black or blue = 30/100=0.3 or 50/100=0.5( I given for both blue and black)

there he said black or blue, so you can answer any one of it

c) not getting red = 100-20=80

probability of not getting red =80/100 = 0.8

Answer 2

Answer:

A.0.2

B.0.8

It can be made by simple maths