Evaluate this pleaseeeee

Mathematics

1 answer:

Alla [95]2 years ago

5 0

Answer:

It would be 3

Explanation:

Let me know if it’s right and ask questions if you have any!

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Delvig [45]

Answer:

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6 0

2 years ago

Read 2 more answers

A card is drawn from a standard deck of 52 cards. What is the theoretical probability, as a decimal, of drawing an ace? Round th

Alexus [3.1K]

$|\Omega|=52\\ |A|=4\\\\ P(A)=\dfrac{4}{52}=\dfrac{1}{13}\approx0.08$

6 0

3 years ago

It took 5 hours to mow 4 lawns. At that rate, how long would it take to mow 7 lawns?

Elanso [62]

1.25 hours for each lawn. 1.25 x 7 = 8.75.

8 0

2 years ago

Test scores are normally distributed with a mean of 500. Convert the given score to a z-score, using the given standard deviatio

Bond [772]

Answer:

The percentage of students who scored below 620 is 93.32%.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 500, \sigma = 80$