Help please Ahmed bought one box of lemons.
The box of lemons cost $4.
There were 24 lemons in the box.
Ahmed sold 3/4 of all the lemons he bought for 30 cents each.
He then sold the rest of the lemons for 20 cents each.
Calculate the percentage profit Ahmed made.
Use $1=100cents

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)