Page 27 - Fixtures
P. 27
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N4 N3 N
.N = N3 + N4 . 43
3 N3
.3
.N4 = 104 − 54 = 9375 . N3 = 103 − 53 = 875
.N = N3 + N4 = 875 + 9375 = 10250
[Inclusion-Exclusion Principle]
ST
ST
..
B A BA :
A∪B ()
A∪B = A + B − A∩B
10 12 . 20
