CAT 2021 Probability Question (Medium)

Question

A rainy day occurs once in every 10 days. Half of the rainy days produce rainbows. What percent of all the days do not produce a rainbow?

Optima Learn · Accepted Answer

Understanding A rainy day occurs once every 10 days, so P rainy 1 10. Half of all rainy days produce a rainbow. We need the percentage of all days that do NOT produce a rainbow. Analyzing P rainbow half of P rainy 1 2 1 10 1 20 5 . So P no rainbow 100 - 5 95 . Evaluating the Options b 10 is simply t

CAT 2021 Probability — Previous Year Question

CAT 2021

Quantitative

Probability

Medium

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