Question

1. (a) In a test consisting of 90 questions, Ama answered 75% of the first 40 questions correctly. If she had to get a score of 80% in the test, how many questions should she answer correctly out of the 90 questions?

Answer 1

.75(40) + q = .80(90)

30 + q = 72

q = 42

Ama has to answer 42 of the 50 remaining questions to obtain a test score of 80%.