In a class of 35 students, 5 are freshmen, 8 are sophomores, 9 are juniors and 13 are seniors. If 1 student is randomly selected
1 answer:
<h3>Answer:</h3>
or 25.71%.
Probability is the likelihood of an event occurring. The desired outcomes are known as successful outcomes. In this scenario, the successful outcomes are when a junior is selected. The sample size is the total number of students.
<h3>Probability as a Fraction</h3>Simple probability (the probability of 1 event) can easily be found as a fraction. For the fraction, the number of successful outcomes should be the numerator and the sample size is the denominator.
This means that the probability of selecting a junior is .
In this case, it is easiest to first find the probability as a fraction, but we can then convert it to a percentage if desired.
To convert to the fraction divide the numerator and denominator (I'm rounding to 4 decimal places).
- 9/35 = 0.2571
Then, multiply this decimal by 100, which is the equivalent of moving the decimal point 2 digits to the left.
- 0.2571 * 100 = 25.71%
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Answer:
24.24%
Step-by-step explanation:
In other words we need to find the probability of getting one blue counter and another non-blue counter in the two picks. Based on the stats provided, there are a total of 12 counters (6 + 4 + 2), out of which only 4 are blue. This means that the probability for the first counter chosen being blue is 4/12
Since we do not replace the counter, we now have a total of 11 counters. Since the second counter cannot be blue, then we have 8 possible choices. This means that the probability of the second counter not being blue is 8/11. Now we need to multiply these two probabilities together to calculate the probability of choosing only one blue counter and one non-blue counter in two picks.
or 0.2424 or 24.24%