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     EduGorilla 
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    Find the number of elements in the union of 4 sets A, B, C and D having 150, 180, 210 and 240 elements, respectively, given that each pair of sets has 15 elements in common. Each triplet of sets has 3 elements in common and A B C D =

    Options :-

    1. 616
    2. 512
    3. 111
    4. 702
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