Answer:
[tex]P(Blue) = 0.3[/tex]
Step-by-step explanation:
Given
Red = 5
Blue = 3
Orange = 2
Required
Probability that the first marble is Blue
First, the total number of marble has to be calculated;
[tex]Total = Red\ Marble + Blue\ Marble + Orange\ Marble[/tex]
[tex]Total = 5 + 3 + 2[/tex]
[tex]Total = 10[/tex]
The probability of Blue being the first is calculated as thus;
[tex]P(Blue) = \frac{n(Blue)}{Total}[/tex]
[tex]P(Blue) = \frac{3}{10}[/tex]
[tex]P(Blue) = 0.3[/tex]
Hence, the required probability is 0.3
