Question

Suppose an urn has r red and w white marbles. Determine the probability that the ki marble is white.

Answer 1

`\text{Probability}=(w)/(r+w)`

Explanation:

Given : Suppose an urn has r red and w white marbles.

To find : Determine the probability that the marble is white ?

Solution :

Number of red marbles = r

Number of white marbles = w

Total number of marbles in an urn = r+w

Favorable outcome is getting the marble is white = w

So, Probability that the marble is white is given by

`\text{Probability}=\frac{\text{Favorable outcome}}{\text{Total outcome}}`

`\text{Probability}=(w)/(r+w)`