Question

A bag contains 5 blue marbles, 2 black marbles, and 3 red marbles. A marble is randomly drawn from the bag.

The probability of not drawing a black marble is


The probability of drawing a red marble is

Answer 1

Answer:
`\text{P(Not Black)}=(4)/(5)`

`\text{P(Red)}=(3)/(10)`

Explanation:

Given: The total number of marbles =
`5+2+3=10`

The number of black balls = 2

Then the number of balls which are not black = 10 -2 =8

Then the probability of not drawing a black marble is given by :-

`\text{P(Not Black)}=\frac{\text{Not black}}{\text{Total}}=(8)/(10)=(4)/(5)`

The number of red marbles = 3

Then the probability of drawing a red marble is given by :-

`\text{P(Red)}=\frac{\text{Red}}{\text{Total}}=(3)/(10)`

Answer 2

Answer: 4/5 , 3/10

Step-by-step explanation:

P(not drawing black marble)=
`( number of marbles which are not black)/(total number of marbles)`

= 8/10

=4/5

P(drawing a red marble)=
`( number of marbles which are red)/(total number of marbles)`

=3/10