Answer:
{1, 2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 18, 21}
Step-by-step explanation:
A∪B is A union B
which is the elements that appear in either set
2?
what is sh? sheets? if so try dividing 4 by 1/2
0/1 = 0
0/1
0 ÷ 1 = 0
n(U)=200
n(M)=140
n(S)=120
n(MuS)complement=40
n(MuS)=n(U)-n(MuS)complement
=200-40
=160
n(MnS)=n(M)+n(S)-n(MuS)
=140+120-160
=260-160
=100
