I hope you understand it
E is the midpoint of DF⎯⎯⎯⎯⎯, DE=6x+1 and EF=7x−4. Find DE, EF, and DF
1 answer:
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Answer:
As per the statement:
One bread recipe calls for 2 1/3 cup of flour another bread recipe called for to 1/2 cup of flour .
First we calculate how much flour the two recipes combine call for, by adding the amount of flour needed for both the recipes:
⇒
⇒
Tim would use cup of flour for two recipe.
We have to find how much flour will he have left over.
Tim has 5 cup of flour.
Subtract 17/6 from 5
Therefore, Tim would have left over.
Answer:
So for this case we have a higher probability for the red exam so we can conclude that the student is more likely to score below 20% on the difficult questions in the red one.
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the scores for the blue exam, and for this case we know the distribution for X is given by:
Where and
We are interested in the probability that P(X<20%)
And the best way to solve this problem is using the normal standard distribution and the z score given by:
And if we replace we got:
Let Y the random variable that represent the scores for the red exam, and for this case we know the distribution for X is given by:
Where and
We are interested in the probability that P(Y<20%)
And the best way to solve this problem is using the normal standard distribution and the z score given by:
And if we replace we got:
So for this case we have a higher probability for the red exam so we can conclude that the student is more likely to score below 20% on the difficult questions in the red one.