Answer:
0.2008 = 20.08% probability that among 150 calls received by the switchboard, there are at least two wrong numbers.
Step-by-step explanation:
In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:
In which
x is the number of sucesses
e = 2.71828 is the Euler number
is the mean in the given interval.
The probability that a call received by a certain switchboard will be a wrong number is 0.02.
150 calls. So:
Use the Poisson distribution to approximate the probability that among 150 calls received by the switchboard, there are at least two wrong numbers.
Either there are less than two calls from wrong numbers, or there are at least two calls from wrong numbers. The sum of the probabilities of these events is 1. So
We want to find . So
In which
Then
0.2008 = 20.08% probability that among 150 calls received by the switchboard, there are at least two wrong numbers.
Answer:
See below.
Step-by-step explanation:
I = PRT/100 will do it.
I = Simple interest.
P = Principal ( Intial Amount invested).
R = Rate (as a percent).
T = time invested.
The above formula gives the amount of interest, If you want to find the interest rate knowing all the other values you have to solve for R:
I = PRT/100
100 I = PRT
R = 100I / PT is the formula .
You will save 41.25 dollars, and you will pay 83.75 dollars if you use the coupon.
To get the percent of money you save you multiply 125 dollars by 33% to get your answer. To get the number of dollars you will take the amount you got by multiplying 125 dollars by 33% and subtract it from 125, so that’s 125 - 41.25 = 83.75
Answer:
estimate 215 answer 10
Step-by-step explanation:
To solve this problem you must apply the proccedure shown below:
1. Let's order the position of each runner shown in the table from greatest to least, to see which one is closer to zero:
-0.480 meters (Runner D).
= -0.56 meters (Runner E).
-1.05 meters (Runner C).
= -1.25 meters (Runner B).
-1.264 meters (Runner A).
= -1.625 meters (Runner F).
2. As you can see, the position of the runner that is closer to zero is:
-0.480 meters (Runner D)
3. Therefore the runner D finished in second place.
4. The runner B finished in fifth place.
The answer is: The runner D finished in second place and the runner B finished in fifth place.