Question

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

Answer 1

B 0.4545

Step-by-step solution

25/100 are boys and got an A

35/100 are girls got an A

so there are 25/55 students that got an a

if you convert to decimal its

0.4545...