Algebra and Up:
Question: There is a 40% chance of rain for Saturday and 40% chance of rain on Sunday. What is the probability it will rain on both Saturday and Sunday?
Answer: 16% or 0.16 or 4/25
Solution: Making a probability tree, we see
Since there is a 40% of rain on both days, we multiply 0.40 × 0.40 = 0.16.
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