Assume that random guesses are made for nine multiple choice questions on an SAT test, so that there are nequals9 trials, each
with probability of success (correct) given by p equals 0.35. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.
1 answer:
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Answer:
Step-by-step explanation:
<u>Step 1: Set y to 15 and solve</u>
<u />
<em>Add 10 to both sides</em>
<em />
<em>Multiply both sides by 5</em>
<em />
Answer:
Answer:
The correct answer is "$159 and $175".
Step-by-step explanation:
The give values are:
Mean,
= $167
Standard deviation,
= $40
Number of commuters,
n = 100
Now,
⇒
On putting the given values, we get
⇒
⇒
⇒
By using the 2 SE rule of thumb, we get
=
=
= ($)
Or,
=
=
= ($)
i.e,
$159 and $175