<span>The answer is 1/8 becase 3/8 divided by 3 equals 1/8
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Correct answer is: P(x<6) is 0.123 and it is usual.
Solution:-
Given that the time a person takes to decide which shoes to purchase follows normal distribution. Which has mean = 8.21 minutes and standard deviation 1.90
Then probability of individual takes less than 6 minutes is
P(X<6) = ![P(z](https://tex.z-dn.net/?f=P%28z%3C%5Cfrac%7Bx-mean%7D%7Bstandard%20deviation%7D%20%29)
= ![P(z](https://tex.z-dn.net/?f=P%28z%3C%5Cfrac%7B6-8.21%7D%7B1.90%7D%20%29%3DP%28z%3C-1.163%29)
= 0.1230
Typically we say an event with a probability less than 5% is unusual.
But here P(X<6) = 0.123 is greater than 5% hence this is usual.
The answer would be 24. The answer would be 24 because 6+6+6+6 = 24, or a shortcut of 6*4 which would be 24. Hope this helps!
Answer:
Regular Pentagon
Step-by-step explanation:
A regular icosahedron is a twenty-faced polyhedron, each face being an equiangular triangle. Each vertex is joined together by 5 faces, therefore the polygon formed at each vertex is a regular pentagon.
We can also figure out the number of faces at each vertex using Euler's formula
F+V=E+2
F=number of faces = 20
E=number of edges = number of triangular faces * edges/triangle /2
(since each edge is shared between two faces)
= 20*3/2
=30
Number of vertices
= E+2-F = 30+2-20 = 12
So number of edges meeting at each vertex
= 30 / (12/2) = 30/6 = 5
(12/2 because each edge joins two vertices).
See attached figure, courtesy of Wikipedia.