Math Problem Statement
A pet store has 1111 puppies, including 44 poodles, 44 terriers, and 33 retrievers. If Rebecka and Aaron, in that order, each select one puppy at random with replacement (they may both select the same one), find the probability that they both select a poodle. Question content area bottom Part 1 The probability is enter your response here. (Type an integer or a simplified fraction.)
Solution
The problem asks to find the probability that both Rebecka and Aaron select a poodle, with replacement.
Step 1: Probability of selecting a poodle
- The total number of puppies is 1111.
- The number of poodles is 44.
So, the probability that one person (Rebecka or Aaron) selects a poodle is:
Step 2: Probability that both select a poodle
Since the selections are independent (because of replacement), the probability that both Rebecka and Aaron select a poodle is:
Thus, the probability that they both select a poodle is:
Let me know if you want more details or have any questions!
Here are five related questions for further practice:
- What is the probability that both select a terrier?
- What is the probability that Rebecka selects a terrier and Aaron selects a poodle?
- What is the probability that neither selects a poodle?
- If the selection was without replacement, how would the probability change?
- What is the probability that Rebecka selects a retriever and Aaron selects any puppy other than a retriever?
Tip: When dealing with "with replacement" problems, each event remains independent, so the total probability is just the product of individual probabilities!
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Math Problem Analysis
Mathematical Concepts
Probability
Independent Events
With Replacement
Formulas
P(both events) = P(event 1) × P(event 2)
P(poodle) = number of poodles / total puppies
Theorems
Multiplication Rule for Independent Events
Suitable Grade Level
Grades 9-12
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