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agasfer [191]
3 years ago
12

A sample of 4 different calculators is randomly selected from a group containing 16 that are defective and 30 that have no defec

ts. What is the probability that at least one of the calculators is defective
0.168
0.160
0.819
0.832
Mathematics
1 answer:
Harrizon [31]3 years ago
4 0

<span>The solution would be like this for this specific problem:

</span>( \frac{30}{46}) * ( \frac{29}{45}) * ( \frac{28}{44}) *( \frac{27}{43})  = 0.168

 

<span>The probability that at least one of the 4 calculators in the sample is defective is complement of 0.168 so the answer is 0.832.</span>

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The number of students going on the trip is 50.

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A school is organizing a weekend trip to a nature preserve.

For each student, there is a $50 charge, which covers food and lodging. There is also a $25 charge per student for the bus.

The school must also pay a $15 cleaning fee for the bus.

The total cost of the weekend is $3,765.

We need to find out how many students will be going on the trip.

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We simply divide the total cost by the cost of each item.

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Find the charge of each student.

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Find the total charge from the students.

= $3,765 - $15

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Find the number of students who went on the trip.

= Total charge from the student's ÷ cost of each student

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= 3750 / 75

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This means 50 students.

Thus the number of students who went on the trip is 50.

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