Question #e37a2
1 Answer
a) C or above:
b) C or 550-650:
c) score <550 or >650:
c) A or B or >650:
Explanation:
a) grade C or above
From the table:
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b) grade C or score 550-650
From the table:
The trick here is to make sure you do not count the students who got a grade of C and a score of 550-650 twice.
#226/300 = 75 1/3%
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c) Score below 550 or above 650
Note that in this case the subgroups are mutually exclusive (nobody can be both below 550 and above 650)
From the table:
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d) Grade of A or B or score above 650
Again we need to be careful not to double count the students who got both an A or B and a score above 650.
(I will use a alternative version than I used for b).
From the table:
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