Question

If you drew a marble from a bag containing 40 marbles and you had a probability of drawing a red marble, how many red marbles are in the bag?

6
10
3
5

Answer 1

There are 5 red Marbles

Explanation:

Alright so since the probability of drawing a red marble is

P(Red) = #Outcomes of Red/#Outcomes in Sample space

The sample Space is 40 marbles.

The probability of drawing red was said to be
`(1)/(8)`

P(Red) =
`(1)/(8)`

`P(Red) = (r)/(40)\\ (1)/(8) = (r)/(40)\\ (40)/(8) = r\\ 5 = r`