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Allushta [10]
2 years ago
6

Dana and Cathy are playing tennis. The probability that Dana wins at least one out of two games is 0.3. What is the probability

that Dana wins at least one out of four
Mathematics
1 answer:
Assoli18 [71]2 years ago
3 0

Answer:

51%.

Step-by-step explanation:

If we have that the probability when at least one wins is 0.3, it means that the probability that none wins would be:

1 - 0.3 = 0.7 would be the probability of not winning any of the first two games, how are two games and are independent events, the probability of not winning any of the 4 games would be:

(0.7) * (0.7) = 0.49

Therefore, the probability of winning at least one game, would be the complement of not winning any, that is:

1 - 0.49 = 0.51

Which means that the probability of winning at least 1 of the four game is 51%.

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The score of 96 is 2 standard deviations above the mean score. Using the empirical rule for a normal distribution, the probability of a score above 96 is 0.0235.
Therefore the number of students scoring above 96 is given by:
230\times 0.0235=5\ students
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Show a way to count from 170 to 410 using tens and hundreds. circle at least 1 benchmark number
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Benchmark are numbers that are used as standards to which the rest of the data is compared to. When counting numbers using a number line, the benchmark numbers are the intervals written on the axis. For benchmark numbers of 10, the number line on top of the attached picture is shown. Starting from 170, the tick marks are added by 10, such that the next numbers are 180, 190, 200, and so on and so forth. When you want to find 410, just find the benchmark number 410.

The same applies to benchmark numbers in intervals of 100. If you want to find 170, used the benchmark numbers 100 and 200. Then, you estimate at which point represents 170. For 410, you base on the benchmark numbers 400 and 500.

6 0
2 years ago
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Jamaica is considering buying either a car which goes 25 miles on 1 gallon of gas, or a truck that goes 10 miles on a gallon of
Ipatiy [6.2K]

Answer: if he drives the car each month, he would spend $150 lesser than when he drives the truck.

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5 0
2 years ago
Mike forgot to replace the cap on a bottle of room freshener. The room freshener began to evaporate at the rate of 15% per day.
aleksandrvk [35]
Given:
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f(x) = 40(.85)^x

x    y
1   34
2   28.9
3   24.57
4   20.88
5   17.75

<span>graph of exponential function going down from left to right in quadrant 1 through the point 0, 40 and approaching the x axis</span>
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