a straight highway is 100 mile long and each mile is marked by a milepost numbered from 0 to 100. a rest area is going to be bui
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She got a 20% discount (or 80% discount). (Work shown for 80%).
First you have to find out how much Mandy paid. So from 15000 you will subtract 3000. 15000-3000=12000.
Next you need to set up your equation.
. You then have to cross multiply. So 100 times 12000, 100*12000=1200000. And 15000 times x is 15000x. Finally you divide both sides by 15000. And 1200000 divided by 15000 is 80. X=80
First you have to find out how much Mandy paid. So from 15000 you will subtract 3000. 15000-3000=12000.
Next you need to set up your equation.
Complete Question
The complete question is shown on the first uploaded image
Answer:
a
Yes the selection of 15 is a binomial experiment
b
c
d
Step-by-step explanation:
considering question a
Generally for and experiment to be binomial
The trial must be independent
There must be only two outcomes for each trial
Generally given that that the 15 adults are selected randomly which mean that the trials will be independent and that desired outcome is ''ether the adult save something for retirement or the adult saves nothing for retirement ''
Then we can say that the selection of 15 adult at is a binomial experiment
Considering question b
Generally the probability that all of the adults save nothing for retirement is mathematically represented as
Here C stands for combination
r = 15 i.e all the selected adults
n is the sample size with value 15
From the question p = 0.20
and q is calculated as
=>
=>
So
Considering question c
Generally the probability that exactly five of the selected adults save nothing for retirement is mathematically represented as
Considering question d
Generally the probability that at least one of the selected adults saves nothing for retirement is mathematically represented as