Problem-Solving and Data AnalysisEasyProbability from a bag of sweets
Problem-Solving and Data Analysis practice question
A bag holds 20 sweets, 5 of which are red. If one sweet is picked at random, what is the probability that it is red?
- A. 1/4Correct
- B. 1/5
- C. 3/4
- D. 5/15
Answer: A. 1/4
5 red out of 20 sweets: 5/20 = 1/4.
Why the other answers are wrong
- B. 1/5
- 1/5 divides by the number of red sweets instead of by the total.
- C. 3/4
- 3/4 is the probability of NOT red (15/20).
- D. 5/15
- 5/15 divides red by non-red instead of by the total.
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