A pharmacist examined a population of 1,000 adults in an attempt to diagnose hypertension. The prevalence of hypertension in this population is known to be 15%. The sensitivity of the examination is...

A pharmacist examined a population of 1,000 adults in an attempt to diagnose hypertension. The prevalence of hypertension in this population is known to be 15%. The sensitivity of the examination is 76% and its specificity is 80%. All adults labeled as "positive" (i.e., suspected of having hypertension) by the pharmacist are sent for examination by a physician. The sensitivity of the physician examination is 95% and its specificity is 90%.

What is the positive predictive value (PPV) of the pharmacist's exam?