Assume there are 13 homes in the Quail Creek area and 4 of them have a security system. Three homes are selected at random: What is the probability all three of the selected homes have a security system? (Round your answer to 4 decimal places.)

Step-by-step explanation:

a. (4/21)(3/20)(2/19)=0.0030

b. (17/21)(16/20)(15/19)=0.5113

c. At least one is 1-probability of none or 1-0.5113=0.4887

They are dependent in that once I pick a home, it changes the probability for the second choice to a conditional probability.

Step-by-step explanation:

a. (4/21)(3/20)(2/19)=0.0030

b. (17/21)(16/20)(15/19)=0.5113

c. At least one is 1-probability of none or 1-0.5113=0.4887

They are dependent in that once I pick a home, it changes the probability for the second choice to a conditional probability.

answer: 2 answers

step-by-step explanation: the first one means to spread the product throughout the marketplace such that a large number of people can buy it.  

the second means the process of making a product or service available for the consumer or business user that needs it.

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answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.