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1 answer:
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<u>Corrected Question</u>
Below is data collected from a random sample of 80 students regarding their fitness habits. If the entire school has 600 students, then what is a reasonable estimate for the number of students who consider themselves to have an average fitness habits.
Answer:
(D)330
Step-by-step explanation:
Out of a random sample of 80 students
44 considered themselves to have AVERAGE fitness habits.
Relative Frequency of Students with average fitness habits=44/80
Therefore, out of the total population of 600 students
Expected Number of Students with average fitness habits
=Relative Frequency of Students with average fitness habits X Total Population
<u>The correct option is D.</u>
Answer:
a.)The total 4-letters passwords when repetition of letters is allowed are 456976
b.)The total 4-letters passwords when repetition of letters is not allowed are 358800
Step-by-step explanation:
Some situations of <em>probability</em> involve multiple events. When one of the events affects others, they are called dependent events. For example, when objects are chosen from a list or group and are not returned, the first choice reduces the options for future choices.
There are two ways to sort or combine results from dependent events. <em>Permutations</em> are groupings in which the order of objects matters. <em>Combinations</em> are groupings in which content matters but order does not.
How many 4-letter passwords can be made using the letters A throught Z if...
a)Repetition of letters is allowed?
There are only 26 possible values for each letter of the password (The English Alphabet consists of 26 letters). The total 4-letters passwords when repetition of letters is allowed are
b) Repetition of letters is not allowed?
If repetition of letters is not allowed, we can only choose 4 letters out of 26. Using the permutation equation
The total 4-letters passwords when repetition of letters is not allowed are
.
Answer:
8
Step-by-step explanation:
