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Deffense [45]
3 years ago
6

a cog company produces 20 cogs a day, 4 of which are defective. Find the probability of selecting 4 cogs from the 20 produced wh

ere all are defective?
Mathematics
1 answer:
Simora [160]3 years ago
7 0

Answer:

1/4845

Step-by-step explanation:

The probability of selecting a defective cog first is

1/5

The second cog is

3/19

The third cog is

1/9

And the fourth cog is

1/17

Multiplying these together we get

1/5 * 3/19* 1/9 * 1/17  = 1/4845

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G a survey of property owners' opinions about a street-widening project was taken to determine if owners' opinions were related
Naily [24]

Answer:

The expected frequency for people against the project and who have over 120 feet of property foot frontage is 3.9.

Step-by-step explanation:

The data provided is:

                                                   Opinion    

Front Footage   For       Undecided Against    Total

Under 45 feet    12                4              4              20

  45-120 feet           35                5             30      70

Over 120 feet     3                2              5              10

       Total           50                11             39    100

The formula to compute the expected frequency is:

E(X)=\frac{\text{Row Total}\times \text{Column Total}}{\text{TOTAL}}

Compute the expected frequency for people against the project and who have over 120 feet of property foot frontage as follows:

E(X)=\frac{\text{Row Total}\times \text{Column Total}}{\text{TOTAL}}

E(5)=\frac{10\times 39}{100}=\frac{39}{10}=3.9

Thus, the expected frequency for people against the project and who have over 120 feet of property foot frontage is 3.9.

6 0
2 years ago
Please help, round to the nearest thousandth
laiz [17]

Answer:

75.398

Step-by-step explanation:

8 0
3 years ago
Please get this done quick
stich3 [128]

Answer:

its A: (-1,-1/2)

Step-by-step explanation:

Find the holes in the graph by factoring and cancelling.

6 0
2 years ago
4 1/2 + 1 + 2 + 1 1/4 + 1/2 + 2/4 how did you get the answer
Anestetic [448]
Your answer is 9 3/4.
6 0
3 years ago
Read 2 more answers
Andy made 7 baskets during a basketball game each basket was worth 2 or 3 points how many different numbers could represent the
Phantasy [73]

Answer:

2+3+2+3+2+3+2=17 because each was worth 2 or 3

5 0
1 year ago
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