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bmharris8262
11.02.2021 •
Mathematics
Find, if possible, the number of elements in sets A, B, and C using the given information on the right.
Select the correct choice below and fill in any answer boxes in your choice.
A.
n(A)=nothing
n(B)=nothing
n(C)=nothing
B.
It is not possible to find the number of elements in sets A, B, and C.
nA∩B=5, nA∩B∩C=2, nB∩C=7, n(B−A)=9, nB∪C=26, nA∩C=8,
nA∪B∪C=31.
Solved
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Ответ:
the 2 20.5's and 21.5's have a mean of 21
so you need a mean of 21 from 20 + one number which is 22
So its 22
second set
again its 22