19. If » (
A∩B) = 10, 11 (
B∩C) = 20 and n (
A∩C)=30, then
the greatest possible value of (
A∩B∩C) is
(a) 15
(b) 20
(C) 10
(d) 4
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x5x5x5xrx4xr 44c3 e rrxrxrxxrrvebeveeb rr rxr e
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