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Answer:
3:1
Step by step explanation:
Total amount of alloy is = 10gm
Metal A = 7.5gm
Metal B = 10gm - 7.5gm = 2.5 gm
the ratio of metal A and metal B in alloy is = 3:1
as per explanation ★ 3× 2.5 = 7.5 gm
★ 1× 2.5 = 2.5 gm
7.5 gm + 2.5 gm = 10gm
hope it is helpful for you
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