Question detail
reasoning check: a bag has 4 blue counters and 7 red counters. Find the probability of choosing a blue counter.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Probability
Question
- A. 0.364
- B. 4.364
- C. -3.636
- D. 0.728
Answer
The correct answer is 0.364.
Explanation
Trace the calculation before choosing. The verified method for Enumerating sets and combinations gives 0.364; no later explanation is allowed to change that value.
Common mistake
Enumerating sets and combinations common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Use tree diagrams where tier-appropriate..
Show the method first, then give the final answer in the required form. Apply this directly to Enumerating sets and combinations.
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