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berliedecius4051
27.09.2019 •
Mathematics
1. in how many ways can 5 states be selected from the top 10 states with the most murders if the order of the 5 states matters?
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Ответ:
This can be done in P(n, r) ways, where:
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For example, there are 5 students in a race, {A, B, C, D, E}. Consider the case when the 3 winners are A, B and C.
{A, B, C}, {A, C, B}, {B, A, C}, {B, C, A}, {C, A, B}, {C, B, A} are 6 different outcomes of the race:
the first, {A, B, C} means that A is first, B is second, C third.
the second, {A, C, B} means that A is first, C is second, B third. and so on.
the race can end in P(5, 3) many ways
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Back to our problem, there are P(10, 5) many ways to list 5 out 10 states:
30,240
Ответ:
Bro i want you not points :(