Answer:
20
Step-by-step explanation:
Let A, B, C and D sets.
Let |A| the number of elements of A.
Remember, the quantity of elements that have the set
is
![|A\cup B\cup C\cup D|=|A|+ |B|+ |C|+|D|-|A\cap B|-|A\cap C|-|A\cap D|-|B\cap C|-|B\cap D|-|C\cap D|-|A\cap B\cap C|-|A\cap B\cap D|-|B\cap C\cap D|-|A\cap B\cap C \cap D|](https://tex.z-dn.net/?f=%7CA%5Ccup%20B%5Ccup%20C%5Ccup%20D%7C%3D%7CA%7C%2B%20%7CB%7C%2B%20%7CC%7C%2B%7CD%7C-%7CA%5Ccap%20B%7C-%7CA%5Ccap%20C%7C-%7CA%5Ccap%20D%7C-%7CB%5Ccap%20C%7C-%7CB%5Ccap%20D%7C-%7CC%5Ccap%20D%7C-%7CA%5Ccap%20B%5Ccap%20C%7C-%7CA%5Ccap%20B%5Ccap%20D%7C-%7CB%5Ccap%20C%5Ccap%20D%7C-%7CA%5Ccap%20B%5Ccap%20C%20%5Ccap%20D%7C)
1. Since each set has 100 elements,
2. each pair of the sets shares 50 elements
3. each three of the sets share 25 elements,
4. the four sets share 5 elements
Then
![|A\cup B\cup C\cup D|=100+100+100+100-50-50-50-50-50-50-25-25-25-5=20](https://tex.z-dn.net/?f=%7CA%5Ccup%20B%5Ccup%20C%5Ccup%20D%7C%3D100%2B100%2B100%2B100-50-50-50-50-50-50-25-25-25-5%3D20)
So, there are 20 elements in the union of the sets A, B, C and D
Answer:
$5.00
Step-by-step explanation:
you would be paying $5.00 per cup
20 divided 4 is 5
No...............................
Answer:
19/20
Step-by-step explanation:
Probability of blue tile= 9/20
probability of letter b tile= 10/20= 1/2
Probability of blue or letter b= Probability of blue + probability of letter b
= 9/20 + 1/2
= 19/20
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