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Elp20
30.08.2021 •
Mathematics
a regular polygon is such that it's exterior angle is one eighth then the size of the interior angle. find the number of sides of yhe polygon
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Ответ:
B. 0.067
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
Number of arrangements:
The number of possible arrangements of n elements is given by:
Desired outcomes
First red(10 - (5+2) = 3 possible)
Last red(2 possible).
Middle 8 arranged in any way.
So
Total outcomes:
Arrangements of 10 elements. So
What is the probability that the first and last blouse are both red?
The correct answer is given by option B.