Math Problem Statement
You pick a card at random. Without putting the first card back, you pick a second card at random.
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What is the probability of picking an even number and then picking an even number?
Simplify your answer and write it as a fraction or whole number.
Solution
We are given three cards numbered , , and . The task is to find the probability of picking an even number first, followed by another even number without replacement.
Step 1: Determine the even numbers.
In this set of three cards, the only even number is .
Step 2: First pick.
The probability of picking an even number (which is ) on the first draw is:
Step 3: Second pick.
Since we do not replace the first card, we are left with two cards: and , which are both odd. Therefore, there are no even numbers left for the second pick.
Thus, the probability of picking an even number on the second draw is:
Step 4: Total probability.
The probability of picking an even number and then another even number is the product of the two individual probabilities:
Thus, the probability of picking an even number followed by another even number is 0.
Would you like more details or have any questions?
Here are 5 related questions:
- What is the probability of picking two odd numbers?
- What is the probability of picking an odd number followed by an even number?
- How does the probability change if we replace the first card before drawing again?
- What is the probability of picking an odd number first and then another odd number?
- What is the probability of picking two numbers that sum to an odd number?
Tip: When calculating probabilities for multiple events, always multiply the probabilities of each event occurring sequentially.
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Math Problem Analysis
Mathematical Concepts
Probability
Events without replacement
Basic counting
Formulas
P(A and B) = P(A) * P(B|A)
Theorems
Multiplication rule of probability for dependent events
Suitable Grade Level
Grades 6-8