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IIT Delhi | MS(R)/PhD Written Test | Sample Question: 15

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The probability that a uniformly random IITD professor understands general relativity is $3 / 5.$ The probability that a uniformly random IITD professor understands quantum physics is $7 / 10.$ Under these assumptions, what is the minimum possible value of the probability that a uniformly random IITD professor understands both general relativity and quantum physics?

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