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boomerjm
25.10.2019 •
Mathematics
Brain and jake left their homes, which are 500 miles apart, and drove straight toward each other. it took 4 hours for the two to meet. if jakes speed was 15 mph slower than brians speed, what was brians speed?
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Ответ:
Let the speed of Brian = X
Brian drove at X miles per hour for 4 hours
Jake drove at X-15 for 4 hours
Set up an equation to get:
4x + 4(x-15) = 500 miles
Simplify:
4x + 4x -60 = 500
8x - 60 = 500
Add 60 to both sides:
8x = 560
Divide both sides by 8:
X = 560/8
X = 70
Brian's speed was x = 70 miles per hour.
Jake's speed was x - 15 = 70-15 = 55 miles per hour.
Ответ:
Follows are the solution to this question:
Step-by-step explanation:
please find the complete question in the attached file.
female = 23 and male = 19 faculty members
Randomly selected member are = 6
In point 1:
The Probability to equally selecting men and women:
In point 2:
The Probability of selecting at least 4 men:
In point 3:
The probability in which no women are chosen implies that 6 selected members are from 23 women:
In point 4:
The Probability in which no more than 4 women are selected: