Question

If you have five red balls and five blue balls in a jar what’s the probability of the first ball being red?

Answer 1

Answer:

red balls = 5

blue balls = 5

total balls = 5 blue+5 red

= 10

$p(first \: ball \: being \: red) = \frac{red \: balls}{total \: balls}$

$p(first \: ball \: being \: red) = \frac{5}{10} = \frac{1}{2}$

Answer 2

Answer:

Step-by-step explanation:

Total number of red balls = 5

Total number of blue balls = 5

Total number of balls in jar = 5 + 5

                                             = 10

Probability of the first ball being red = total number of the red ball/total number of balls in the jar

                                                             = $\frac{5}{10}$

                                                             = $\frac{1}{2}$

Therefore, the probability of the first ball being red = $\frac{1}{2}$, 50% or 0.5 (in any way you are instructed to write it in)