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Andrew [12]
3 years ago
10

Question 1: The management of a grocery store has kept a record of bad checks received per day for a period of 200 days. The dat

a are shown below. Number of Bad Checks Received Number of Days 0 8 1 12 2 20 3 60 4 40 5 30 6 20 7 10 Develop a probability distribution for the above data. Determine the cumulative probability distribution. What is the probability that in a given day the store receives four or less bad checks? What is the probability that in a given day the store receives more than 3 bad checks?

Mathematics
1 answer:
nydimaria [60]3 years ago
4 0

Answer:

The probability that in a given day the store receives four or less bad checks is 0.70.

The probability that in a given day the store receives more than 3 bad checks is 0.50.

Step-by-step explanation:

The data provided shows the number of bad checks received by the management of a grocery store for a period of 200 days.

The probability distribution and the cumulative probability distribution are shown in the table attached below.

Let the number of bad checks received in a day be represented by <em>X</em>.

Compute the probability that in a given day the store receives four or less bad checks as follows:

P (X ≤ 4) = P (X = 0) + P (X = 1) + P (X = 2) + P (X = 3) + P (X = 4)

              =0.04+0.06+0.10+0.30+0.20\\\\=0.70

Thus, the probability that in a given day the store receives four or less bad checks is 0.70.

Compute the probability that in a given day the store receives more than 3 bad checks as follows:

P (X > 3) = 1 - P (X ≤ 3)

              = 1 - [P (X = 0) + P (X = 1) + P (X = 2) + P (X = 3)]

              =1-[0.04+0.06+0.10+0.30]\\=1-0.50\\=0.50

Thus, the probability that in a given day the store receives more than 3 bad checks is 0.50.

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6.81 is what percent of 45.5
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To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 45.5 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 45.5 is 100%, so we can write it down as 45.5=100%.

4. We know, that x is 6.81% of the output value, so we can write it down as x=6.81%.

5. Now we have two simple equations:

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where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

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6. Now we just have to solve the simple equation, and we will get the solution we are looking for.


7. Solution for what is 6.81% of 45.5


45.5/x=100/6.81

(45.5/x)*x=(100/6.81)*x       - we multiply both sides of the equation by x

45.5=14.684287812041*x       - we divide both sides of the equation by (14.684287812041) to get x

45.5/14.684287812041=x

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