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If A = {x : x is a multiple of 3)and, B ...

If A = {x : x is a multiple of 3)and, B ={x : x is a multiple of }, then A-B is

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Given,A = [x : x is a multiple of 3]
`A = {3, 6, 9 ….}`
B = [x : x is a multiple of 5]
`B = {5, 10, 15 ….}`
...
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  20. If AnnB=B , then a.AsubeB b. BsubeA c. A=phi d. B=phi

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