मान लीजिए A = {7, 8, 9, 10, 11, 12} और B...

मान लीजिए A = {7, 8, 9, 10, 11, 12} और B = {7, 10, 14, 15} है । (A - B) और (B- A) में अवयवों की संख्या क्रमशः क्या है ?

A

2 और 4

B

4 और 2

C

2 और 2

D

4 और 4

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