chilanka
10.10.2019 •
Mathematics
Atwo-way frequency table is shown below that displays the relationship between age and preferred soft drink. we took a sample of 100 people and recorded the following results:
cola rootbeer dr. fizz total
10–25 years 10 5 20 35
26–40 years 15 10 10 35
41–55 years 20 10 0 30
total 45 25 30 100
what is the probability (rounded to the nearest whole percent) that a randomly selected person is 10 to 25 years old or prefers drinking rootbeer?
60%
55%
10%
5%
Solved
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Ответ:
10–25 years 10 5 20 35
26–40 years 15 10 10 35
41–55 years 20 10 0 30
Total 45 25 30 100
Probability that a randomly selected person is 10-25 years old or prefers drinking rootbeer
Probability of 10-25 years old = 35/100 = 35%
Probability of drinking rootbeer = 25/100 = 25%
Probability of 10-25 years or perfers to drinking rootbeer
= 35% + 25% = 60% 1st option
Ответ:
Thus the dimensions to maximize the area is 30 by 60
Step-by-step explanation:
Let x= the length of the side perpendicular to the pen
and 120-2x= length of the side parallel to the shed
Area = x (120-2x) (1)
Area =120x - 2
The formula for the w-value of maximum is: -b/2a, thus our value will be:
-120/(-4) = 30
and substitue x = 30 into (1), we have: 120-2(30) =60
Thus the dimensions to maximize the area is 30 by 60