Maths (no calculator in 2026)
Harder: several stepsA bag has 3 red balls and 2 blue balls. You take out 2 balls, one after the other, and do not put the first one back. What is the probability that both are red?
- 3/10
- 9/25
- 2/5
- 3/5
- 1/2
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Answer: A
First ball red: 3 out of 5. Then 2 red balls are left out of 4: 2 out of 4. Multiply: 3/5 × 2/4 = 6/20 = 3/10. B (9/25) is the trap: it puts the first ball back.




