4. Probability
Basic Concepts of Probability
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In your coin purse, you have 3 quarters, 4 nickels, & 2 dimes. If you pick a coin at random, what is the probability that it will be a quarter?
A
B
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Verified step by step guidance1
First, identify the total number of coins in the purse. You have 3 quarters, 4 nickels, and 2 dimes. Add these numbers together to find the total number of coins: 3 + 4 + 2.
Next, determine the number of favorable outcomes for the event of picking a quarter. Since there are 3 quarters, the number of favorable outcomes is 3.
To find the probability of picking a quarter, use the formula for probability: \( P(\text{quarter}) = \frac{\text{number of quarters}}{\text{total number of coins}} \).
Substitute the values into the formula: \( P(\text{quarter}) = \frac{3}{3 + 4 + 2} \).
Simplify the expression to find the probability. This will give you the probability of picking a quarter from the purse.
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