Question: During a visit to a primary care physicians office, the probability of having neither lab work nor referral to a specialist is 0.21. Of those

During a visit to a primary care physician’s office, the probability of having neither lab work nor referral to a specialist is 0.21. Of those coming to that office, the probability of having lab work is 0.41 and the probability of having a referral is 0.53. What is the probability of having both lab work and a referral?

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