80% of 400
We can set up a proportion because it makes things more clear.
First, we need to assume that 400 is our '100'. Usually, 100 is our total value.
400/x=100/80
<span>(400/x)*x=(100/80)*x </span>
<span>400=1.25x </span>
<span>400/1.25=x </span>
<span>320=x </span>
<span>x=320
</span>
Our final answer: 320
Answer:
0.8125
Step-by-step explanation:
For a uniform distribution,
f(x) = 1/(b-a)
where b = upper limit of the uniform distribution = 6 minutes
a = lower limit of the uniform distribution = 2 minutes.
Then, probability of x falling between two intervals for a uniform distribution is simply given as
P(a < x < c) = ∫ᶜₐ f(x) dx = [1/(b-a)] ∫ᶜₐ dx
= (c - a)/(b - a)
For the question,
it takes the elevator 30 seconds to go from floor to floor, find the probability that a hurried customer can reach the first floor in less than 5.75 minutes after pushing the elevator button on the second floor.
The elevator spends 0.5 min to reach the first floor from the second floor, so the maximum waiting time for the hurried customer will be
5.75 - 0.5 = 5.25 minutes.
P(2 < x < 5.25) = (5.25-2)/(6-2) = (3.25/4) = 0.8125
Hope this Helps!!!
Answer:
D
Step-by-step explanation:
Because they are opposite of each other
