1. Which of the following are in proportion?
a) 21, 35, 24, 40 b) 5, 7, 40, 64
c) 90, 270, 17, 51 d) 75, 21, 18,6
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Answer:
a and c
Step-by-step explanation:
21,35,24,40 and 90,270,17,51 are in proportion
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