A bag has 8 red, 5 blue and 1 green balls. One ball is drawn at random. What is the probability that it is red?
Answer and explanation
Correct answer: B. 4/7
- Step 1: There are 14 balls in total and 8 are red, so the probability is . Answer: 4/7. Why not the others: 5/14: uses the wrong colour. 8/13: ignores the green ones. 1.75: inverts the fraction.
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