Answer:
170
Step-by-step explanation:
According to the given information,
Number of true/false questions = 50
Number of multiple-choice questions = 25
Worth of each true/false question = 2
Worth of each multiple-choice question = 4
Using this information we get
Total marks of true/false questions = 50 × 2 = 100
Total marks of multiple-choice questions = 25 × 4 = 100
It is given that Linda answers a true/false question correctly is 0.9, and the probability that she answers a multiple-choice question correctly is 0.8.
Expected marks of true/false questions = 100 × 0.9 = 90
Expected marks of multiple-choice questions = 100 × 0.8 = 80
Slader expected score on the final is
Expected score = 90+80=170
Therefore, the expected score on the final is 170.
