NEED THIS ASAP!!
20% of the students in Mr. MacGregor’s class earned As on their final projects. 5% of the students who received As on their final projects also received As on their final exams. Find the probability that a student chosen at random received an A on both the final exam and the final project.

A.
0.01
B.
0.05
C.
0.10
D.
0.50

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.