A course grade is 25% unit test, 35% mid-term and 40% final exam. Riya scored 60 in the unit test and 70 in the mid-term. What must she score in the final to get an overall 75?
Competition practiceStatistics
A95
B88.75
C85
D90
Step-by-Step Solution
0.25(60)+0.35(70)+0.40x=75 gives 15+24.5+0.4x=75, so x=0.435.5=88.75.
Answer: B) 88.75
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