The cardinality of the union between two sets is given by
In fact, if an element is in both A and B, it is counted in both N(A) and N(B), so we're counting it twice. By subtracting the cardinality of the interserction, we're taking back one of these "extra-counted" element, and the count is correct. In your case, the numbers are
This means that the two sets cover, without repetitions, 43 of the 66 elements in the sets. So, there are
elements which are in neither A nor B
Grim- adjective. If grim was a color it would be a deep purple or black. It is a depressing word and is often related to death or an uninviting experience. Grim is a worrying word and is often cautioned.
Answer:
22.5
Step-by-step explanation:
To find the rate of speed per hour, you need to divide the kilometer (90) by the hours (4).
90/4=
22.5
The Answer is: 12 weeks
You just take 300/25 and you get the weeks
Answer:
54 unit ^2
Step-by-step explanation:
Well a formula for a rectangle is a=lw
So 6*9=54
The area is 54
