Probability helps us to know the chances of an event occurring. The probability of choosing a black marble from the bowl is 0.2917.
<h3>What is Probability?</h3>
Probability helps us to know the chances of an event occurring.
Probability=(Desired Outcomes)/(Total Number of possible outcomes)
The total number of marbles in the bowl is 24, while it contains 6 white, 8 blue, 7 black and 3 red. Therefore, the probability of choosing a black marble from the bowl is,
P(Black marble) = Number of black marble/Number of total Marble
P(Black Marble) = 7/24 = 0.2917
Hence, the probability of choosing a black marble from the bowl is 0.2917.
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First, find the z-score:
z = (value - mean) / sdev
= (275 - 280) / 15
= - 0.33
In order to use a standard normal table, we need a positive z-score:
P(z < -0.33) = 1 - P(z < 0.33)
Looking at the table, we find P(z < 0.33) = 0.6293
Therefore:
P(z < -0.33) = 1 - 0.6293 = 0.3707
Hence, you have a probability of about 37% <span>that a randomly selected pregnancy lasts less than 275 days.</span>
Answer: D
Step-by-step explanation:
Only option that has a not equal inequality sign just like the graph.
It equals 0.1365853659
you may round as needed
