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2 years ago

When rolling a fair die 100 times, what is the probability of rolling a "4"exactly 25 times?.

SAT

1 answer:

tia_tia [17]2 years ago

3 0

16.6666666666666666666666666666666666666666666666666666666666666666666666

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What is the denominator of the simplified expression? 2 n

Shtirlitz [24]

The expression $\frac{2n}{6n + 4} * \frac{3n + 2}{3n - 2}$ is a product expression

The denominator of the simplified fraction is 3n -2

<h3>How to determine the denominator?</h3>

The expression is given as;

$\frac{2n}{6n + 4} * \frac{3n + 2}{3n - 2}$

Divide the first fraction by 2/2

$\frac{n}{3n + 2} * \frac{3n + 2}{3n - 2}\\$

Evaluate the above product

$\frac{n}{3n - 2}$

The above fraction is a simplified fraction of $\frac{2n}{6n + 4} * \frac{3n + 2}{3n - 2}$ , and the denominator is 3n - 2

Hence, the denominator of the simplified fraction is 3n -2

Read more about fractions at:

brainly.com/question/15215592

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2 years ago

Suppose that IQ scores have a bell-shaped distribution with a mean of 101 and a standard deviation of 12. Using the empirical ru

7nadin3 [17]

95.44% IQ scores are between 77 and 125

We're given,

Mean (a)=101

standard deviation (b)=12

To find : $P[77 < x < 125]$

Using Empirical Rule:

∴ $P[77 < x < 125]$ $=$ $P[\frac{77-101}{12} < \frac{x-a}{b} < \frac{125-101}{12}]\\$

$=P[-2 < z < 2]\\$

$=P[Z < 2]-P[Z < -2]\\$

$=0.9772-0.0228\\$

$=0.9544$ =95.44% (approx)

Learn more about Empirical rule of IQ calculation here:

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#SPJ10

3 0

2 years ago

Can someone please help me with my last question??

frutty [35]

Answer:

SURE BUDDY :)

Explanation:

4 0

2 years ago

Read 2 more answers

13.Total no. of English Alphabet ____<br>a)26<br>b)27<br>c)28<br>d)29

FromTheMoon [43]

26 is the answer (a)

6 0

3 years ago

Read 2 more answers

Let A and B be events with P(A) = 0.61 and P(A ∩ B) = 0.39. For what value of P(B) will A and B be independent?

timofeeve [1]

Answer:

$P(B) = 0.64$

Explanation:

Given

$P(A) = 0.61$

$P(A\ n\ B) = 0.39$

Required

Determine P(B)

If A and B are independent, then:

$P(A\ n\ B) = P(A) * P(B)$

Substitute values for P(A) and P(A n B)

$0.39 = 0.61 * P(B)$

Make P(B) the subject

$P(B) = \frac{0.39}{0.61}$

<em /> $P(B) = 0.64$ <em> --- approximated</em>

7 0

3 years ago