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kotegsom [21]
3 years ago
5

A band leader randomly selects 2 students out of 80 band members. If you and your brother are both band members, what is the pro

bability that you are both selected?
Mathematics
1 answer:
drek231 [11]3 years ago
6 0
The first time the band leader selects one member, the probability that either you or your brother gets selected would be 2 out of 80 or in fraction 2/80. Now, once one of you gets chosen, for the next selection, there are only 79 members left and the probability that the remaining one (between you and your brother) gets selected after is 1/79. So, if you are both to be selected, the combined probability for that to happen will be (2/80)(1/79) = 1/3160. Therefore, the answer is 1/3160<span>.</span>
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A cylinder has a surface area of 224 pie square meters and a diameter of 14 meters. Find the height of the cylinder.
inna [77]

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Step-by-step explanation:

Hi, to answer this question we have to apply the formula:

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3 years ago
The vertex of a parabola is (3,2). A second point on the parabola is (1,5).which of the following points is also on the graph?
vekshin1
+ <span>The vertex of a parabola is (3,2),
that means the parabola's equation is y=a(x-3)</span>²+2
+ <span>A second point on the parabola is (1,5) and we replace x=1 and y=5. We have: 
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