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
Solving equations and inequalities
Question
- A. 0.222
- B. 2.222
- C. -1.778
- D. 0.444
Answer
The correct answer is 0.222.
Explanation
calculator check uses Algebraic modelling: identify the quantities, do the stated operation, and select 0.222 because it matches the verified final answer.
Common mistake
Algebraic modelling common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Derive and solve two simultaneous equations from a contextual problem..
Show the method first, then give the final answer in the required form. Apply this directly to Algebraic modelling.
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