It takes 2 minutes to fill a tank with 16 gallons of gasoline.
1 answer:
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Answer:
Probability is
Step-by-step explanation:
This problem can be easily done tree diagram.
Few things keep in mind :
- From starting of match three victories of A.
- Less then or equal to two victories of B.
- In each matches there are two possibilities either favourable for A or B.
First case if A wins first match
- two victories of B then two of A
- victory of B then A then B then A
- victory of B then A then A
Second case if B wins first match(favorable)
- victory of two B then three A
So total cases are 4 and favorable is one
probability=
[Tree diagram is in attachment]
Answer:
2.50 standard deviations above the mean
Step-by-step explanation:
The z-score measures how many a measure is above or below the mean. If the score is positive it is above the mean. If it is negative, it is below. The zscore is given by
In which is the mean and
is the standard deviation.
In this problem, we have that:
Last year there were 64 inches of snow. How many standard deviations from the mean is that?
This is Z when X = 64. So
So the correct answer is:
2.50 standard deviations above the mean