Cayla's answer to Chelsia's Secondary 4 E Maths Singapore question.

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Cayla
Cayla's answer
16 answers (A Helpful Person)
1st
Probability of rain = 0.3
Probability of no rain =1-0.3=0.7
Expected profits = expected sum collected - cost incurred = 0.7×$15000-0.3×$8000=$8100