Fido fetches 3 out of every 54 balls Flo throws. At this rate, how many balls must Flo throw to be sure that Fido fetches 54 balls?
A.
18
B.
162
C.
972
D.
2916
Exam No：2021 First Round Grade 4 Year：2021 Question No：10
Answer:
C
Knowledge points:
G4 - Arithmetic - Rate (Basic)
Solution:
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