___ are in proprtion.
a) 2,3,4,6
b) 2,5,3,10
c) 2,3,5,10
d) 3,7,7,3
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10. 0.2 to 8. 11. 72 to 1.2. 12. 3c to 5c. EXERCISES. 7. 6. 1. 3. 4. 4 1. 1. 2. 5. 7. 4. 4. 3. 2 ... There are three other proportions using a, b, c and d for which ad = bc.
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