When Sally went bowling, her scores were 108, 72, and 95. If she bowls a 4th game, what will her score need to be to give her an
2 answers:
Answer:
The answer is 89.
Step-by-step explanation:
In order to determine the score that she needs, we have to know about the mean. The <em>mean </em>is the average that we use frequently, where we add up all the numbers and then divide by the amount of numbers.
We have to make a equation where let be x the fourth score. Then:
First score=108
Second score=72
Third score=95
Fourth score=x
Average (mean)=91
Amount of numbers=4
Finally, the score that she will need is 89.
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Answer:
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Step-by-step explanation:
Probability that the car encounters a green light on the first day: .
To meet the question's conditions, the car needs to encounter another green light on the second day. Given that the colors of the light on each day are "independent," the chance that there's a green light followed by another green light will be
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- Condition is met on the first two days and green light on the third day:
.
- Condition is met on the first three days and green light on the fourth day:
.
To meet the condition on the fifth day, there needs to be a yellow light. The probability that the condition is met on the first four days and on the fifth day will be .
To meet the condition on the sixth day, all prior days should meet the conditions. Besides, there needs to be a red light on the sixth day.
- Seventh day:
- Eighth day:
- Ninth day:
- Tenth day:
The question asks that the condition be met on all ten days. As a result, the probability of meeting the condition will be equal to the probability on the tenth day: .