7. How many students use blue but do not use a black ink pen?
A. 11
B. 31
C. 45
D. 63

Answer:
B. 31 correct me if I wrong
Step-by-step explanation:
pa brainliest naman ty
7. How many students use blue but do not use a black ink pen?
A. 11
B. 31
C. 45
D. 63
ANSWER
45
CORRECT ME IF MY ANSWER IS WRONG...
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