Question

A marble is drawn at random from a box containing 10 red, 30 white, 20 blue, and 15 orange marbles. Find the probability that it is (a) orange or red, (b) not red or blue, (c) not blue, (d) white, (e) red, white, or blue

Answer 1

Step-by-step explanation:4/5

Answer 2

Explanation:

given data:

total marbles = 75

red marble = 10

white marble = 30

blue marble = 20

orange marble = 15

solution:

a. Probability of drawing an orange or red

= 15/75 + 10/75

= 1/3

b. probability of not drawing a red or blue

= 1 - 20+10/ 75

= 3/5

c. Not blue

= 1 - p

= 1 - 20/75

= 11/5

d. Probability of drawing a white

= 30/75

= 2/5

e = red, white or blue

= 10/75 + 30/75 + 20/75

= 4/5