If you have 3 red balls, 2 blue balls, and 5 green balls, what is the probability of picking a blue ball if you choose one at random?
Question
If you have 3 red balls, 2 blue balls, and 5 green balls, what is the probability of picking a blue ball if you choose one at random?
Solution
To calculate the probability, you need to know the total number of outcomes and the number of favorable outcomes.
Step 1: Calculate the total number of balls. You have 3 red balls, 2 blue balls, and 5 green balls. So, the total number of balls is 3 + 2 + 5 = 10 balls.
Step 2: Identify the number of favorable outcomes. You want to find the probability of picking a blue ball. There are 2 blue balls, so there are 2 favorable outcomes.
Step 3: Calculate the probability. The probability of an event is given by the number of favorable outcomes divided by the total number of outcomes. So, the probability of picking a blue ball is 2 (the number of blue balls) divided by 10 (the total number of balls), which equals 0.2 or 20%.
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