<prompt> Formula to calculate sensitivity of a screening test -True positivetrue positive false negativeTrue negativetrue positive false negativeTrue positivetrue negative - false positiveTrue negativetrue negative false positive  <response>: Ans. is a i.e,, True positivetrue positive false negative Number of true positiveSensitivity ---Number of true positives Number of false negative.N umber of true negativesSpecificity ---Number of true negative number of false positives. 