Question

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

Answer 1

Answer: $\text{P(Not Black)}=\frac{4}{5}$

$\text{P(Red)}=\frac{3}{10}$

Step-by-step 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 :-

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

The number of red marbles = 3

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

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

Answer 2

Answer:  4/5 , 3/10

Step-by-step explanation:

P(not drawing black marble)=$\frac{ number of marbles which are not black}{total number of marbles}$

                                     = 8/10

                                     =4/5

P(drawing a red marble)=$\frac{ number of marbles which are red}{total number of marbles}$

                                          =3/10