Answer:
solution:-We know that for any two finite sets A and B, n(A∪B)=n(A)+n(B)−n(A∩B).
Here, it is given that n(A)=20,n(B)=30 and n(A∪B)=40, therefore,
n(A∪B)=n(A)+n(B)−n(A∩B)
⇒40=20+30−n(A∩B)
⇒40=50−n(A∩B)
⇒n(A∩B)=50−40
⇒n(A∩B)=10
Hence, n(A∩B)=10
Step-by-step explanation:
hope it helps you friend ☺️
Answer:
ok
Step-by-step explanation:
ok
Answer:
9.3 hours
Step-by-step explanation:
Given
Required
Hours of sunlight on Feb 21, 2013
First, calculate the number of days from Jan 1, 2013 to Feb 21, 2013
So:
So, we have:
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<em> --- approximated</em>
There are 3 terms. Because if you simplify it, 7x and 2x would be 9x.. and -5+11 would be 6 so there would be (9x+3y+6) left. so 3 terms
