Grading scale 2 has the following weights- tests- 60% quiz- 15% homework- 10% final exam- 15% what do you need to score on the final exam to make an 78 in the class if your grades are- show steps. test grades- 85 quiz- 87 homework- 68 final exam- ? ? a. 85(60) + 87(15) + 68(10) + x(15) = 78 x = 49.33 b. 85(6.0) + 87(1.5) + 68(1.0) + x(1.5) = 78 x = 53.62 c. 85(.60) + 87(.15) + 68(.10) + x(.15) = 78 x = 47.67 d. 85(.60) + 87(1.5) + 68(.10) + x(1.5) = 78 x = 35.59

Step-by-step explanation:The answer is C.

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

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