Answer: Mean = 20 and standard deviation = 4
Step-by-step explanation:
Let x represents the success of getting the correct answer.
Here, the total number of trials(n) = 100
The probability of getting the correct answer, p = 1/5
Thus, the mean of the number of correct answer,
Now, the standard deviation,
Thus, First option is correct.
Answer:
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<h2>Question</h2>Find the number that makes the ratio equivalent to 2:7
<h2>Answer</h2>4:14, 6:21, 8:28
Step-by-step explanation:
Ratios that are equal to each other are called equivalent ratios. You can find an equivalent ratio by multiplying or dividing each term of a ratio by the same number.
Therefore, I Hope this helps!
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Answer:
Step-by-step explanation:
To solve for x, you need to get x alone. In this problem, k is a constant.