Question detail
notation check: a bag has 1 blue counters and 27 red counters. Find the probability of choosing a blue counter. Show your working one step at a time.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Solving equations and inequalities
Question
notation check: a bag has 1 blue counters and 27 red counters. Find the probability of choosing a blue counter. Show your working one step at a time.
Answer
The final answer is 0.036. Probability uses favourable outcomes and total outcomes. The favourable outcomes are 1. The total outcomes are 28. Divide 1 by 28 and round to three decimal places. 0.036
Explanation
exam warm-up keeps the canonical answer 0.036 fixed before the model answer is written, so the worked solution and final answer agree.
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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