A cylinder has a height of 8.1 inches and circular base with a diameter of 2.7 inches. The cylinder contains 3 green spheres, each having a diameter of 2.7 inches.
If a point is chosen at random inside the cylinder, then what’s the probability the point belongs outside of the spheres. Show all work necessary.

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Answer:

A point is chosen at random inside the cylinder, then probability the point belongs outside of the spheres is 0.25

Step-by-step explanation:

Let's find volume of the cylinder and volume of the three spheres.

Volume of cylinder =[tex]\pi r^{2} h[/tex]

Volume of sphere =[tex]\frac{4}{3} \pi r^{3}[/tex]

Now, r =2.7

h=8.1

Find volume of each shape.

Volume of cylinder =[tex]\pi (2.7)^{2} (8.1)[/tex]

                             =59.049[tex]\pi[/tex]

Now, volume of 3 spheres =[tex]3*\frac{4}{3} *\pi *(2.7)^{3}[/tex]

                                         =78.732[tex]\pi[/tex]

Now, p(E)=[tex]\frac{Outcomes favorable to event E}{Total number of outcomes}[/tex]

So, Probability of point is chosen at random inside the cylinder which belongs outside of the spheres  is

                  [tex]\frac{78.732\pi -59.049\pi }{78.732\pi }[/tex]

Let's simplify them

             0.25

A point is chosen at random inside the cylinder, then probability the point belongs outside of the spheres is 0.25