A class consists of 55% boys and 45% girls. It is observed that 25%
of the class are boys and scored an A on the test, and 35% of the
class are girls and scored an A on the test.
What is the probability of a student chosen at random and is found
to be a boy, given that the student scored an A?
A- 0.7778
B- 0.4545
C- 0.6364
D- 0.5556