edson23
15.07.2020 •
Mathematics
If P and Q are two sets such that P U Q has 40 elements,P has 22 elements and Q has 28 elements,how many elements does P intersection Q have
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Ответ:
Step-by-step explanation:
n(P∪Q) = 40
Using Formula
n(P∪Q)=n(P)+n(Q)−n(P∩Q)
For, n(P∩Q), it becomes
=> n(P∩Q)=n(P)+n(Q)−n(P∪Q)
So,
=> n(P∩Q) = 22+28-40
=> n(P∩Q) = 50-40
=> n(P∩Q) = 10 elements
Ответ:
90x - 60
Step-by-step explanation:
-10(-9x + 6)
=90x - 60
(I also looked it up)