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damiangibson2
18.07.2019 •
Mathematics
Arandom two-digit number(10-99) is drawn.find the probability p(32)
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Ответ:
__
1
There are 90 different possible numbers. (10-99)
And only ONE number that equals 32. (32.)
Ответ:
Step-by-step explanation:
For these sets, it is easy enough to list the elements and count them.
U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
n(U) = 20
A = {1, 3, 5, 7, 9, 11, 13, 15}
n(A) = 8
B = {7, 11, 13, 17, 19}
n(B) = 5
A'∪B = {2, 4, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20}
n(A'∪B) = 15