PLEASE HELP ME IM BAD AT THIS EVEN THOUGH ITS REALLY EASY! SO YOU PROBABLY COULD DO IT!
1 answer:
Answer:
<u><em>THE ANSWERS ARE OPTION C and E</em></u>
Step-by-step explanation:
so there are 3 different types of loaves .
the price of french bread is ;
from the question , we find that the price of wheat bread is twice of that of the french bread. thus ,
the price of wheat bread is ;
the price of cinnamon raisin bread is $2.50 more than the wheat bread. thus ,
the price of cinnamon raisin bread is ;
<em>now the total amount she spent was : $11.25</em>
thus ,
which gives us ,
<em><u>∴ The correct answers are C and E</u></em>
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Using the binomial distribution, supposing that 0.3 of the callers have to wait more than 8 minutes to have their calls answered, it is found that there is a 0.3828 = 38.28% probability that at most 2 of the next 10 callers will have to wait more than 8 minutes to have their calls answered.
For each caller, there are only two possible outcomes, either they have to wait more than 8 minutes to have their calls answered, or they do not. The probability of a caller having to wait more than 8 minutes is independent of any other caller, which means that the binomial distribution is used to solve this question.
Binomial probability distribution
The parameters are:
- x is the number of successes.
- n is the number of trials.
- p is the probability of a success on a single trial.
In this problem:
- 10 callers, hence
- Suppose that 0.3 of them have to wait more than 8 minutes, hence
The probability that <u>at most 2</u> of the next 10 callers will have to wait more than 8 minutes is:
Then
Then:
0.3828 = 38.28% probability that at most 2 of the next 10 callers will have to wait more than 8 minutes to have their calls answered.
A similar problem is given at brainly.com/question/25537909