Question detail
calculator check: a bag has 2 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. 0.222
- B. 2.222
- C. -1.778
- D. 0.444
Answer
The correct answer is 0.222.
Explanation
calculator check uses Exhaustive and mutually exclusive outcomes: identify the quantities, do the stated operation, and select 0.222 because it matches the verified final answer.
Common mistake
Exhaustive and mutually exclusive outcomes common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Apply the property that probabilities of exhaustive outcomes sum to 1..
Show the method first, then give the final answer in the required form. Apply this directly to Exhaustive and mutually exclusive outcomes.
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