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Question
Are the sets A = {b, c, d, e} and B = {x : x is a letter in the word ‘MASTER’} joint?
Solution
A = {b,c,d,e}
B = {x : x is a letter in the word "MASTER"}
∴ B = {m, a ,s, t, e, r}
Hence set A and set B are joint because these sets have element e in common.
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