A calculator manufacturing company checks 500 calculator units and finds that 25 of them have non-functioning keys. What is the relative frequency of a non-defective calculator from this batch of items?(1 point)
Responses
475/500
475 over 500
19/20
19 over 20
1/20
1 over 20
25/500
25 over 500
475/500
475 over 500
A quality controller inspected 1,000 units of a product and rejected 150 units due to defects. Find the experimental probability that a unit will pass inspection.(1 point)
Responses
320
3 over 20
0.15%
0 point 1 5 percent
1720
17 over 20
15%
The experimental probability that a unit will pass inspection is calculated by subtracting the number of defective units from the total and then dividing by the total number of units:
Number of units that will pass inspection = Total units - Defective units
Number of units that will pass inspection = 1000 - 150 = 850
Experimental probability = Number of units that will pass inspection / Total units
Experimental probability = 850 / 1000 = 0.85 or 85%
Therefore, the correct response is 85%.
85% isn't an option
Apologies for the oversight.
The correct response based on the options provided would be:
3 over 20
In which scenario is the theoretical probability equal to the experimental probability?(1 point)
Responses
A coin is flipped six times and heads appears each time
A coin is flipped six times and heads appears each time
A number cube is rolled six times and an even number appears each time
A number cube is rolled six times and an even number appears each time
A number cube is rolled six times and a 6 appears four times
A number cube is rolled six times and a 6 appears four times
A coin is flipped six times and heads appears three times
A coin is flipped six times and heads appears each time
A part of a promotion, students who participate in a survey are mailed a free pass for one of three activities: movies, roller skating, or bowling. Participants have an equal chance of receiving each type of pass. If 900 students participate, how many would be expected to receive a pass for roller skating?(1 point)
Responses
23
2 thirds
600
600
450
450
300
Since the participants have an equal chance of receiving each type of pass, the expected number of participants receiving a roller skating pass can be calculated as follows:
Total number of participants = 900
Expected number receiving a roller skating pass = Total number of participants / Number of possible passes = 900 / 3 = 300
Therefore, the correct response is 300.
On the math test, Samantha missed 4 of the 20 questions. What is the relative frequency of correct responses?(1 point)
Responses
0.2
0.2
0.8
0.8
0.4
0.4
0.16