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3 years ago

A company stock was selling at $15 a share a month later it was selling at $27 a share what is the percent increase

Mathematics

2 answers:

Nonamiya [84]3 years ago

8 0

Answer:

80%

Step-by-step explanation:

So we take the difference and divide the original number

(27-15)/15

12/15=0.8

which is 80% increase

Novay_Z [31]3 years ago

5 0

Answer:

80.00%

Step-by-step explanation:

Answered By Huntermike976

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At a pet shop 5 herbals out of 15 have black hair and 3 mice out of 9 have black hair. Are the ratios the Same?

dmitriy555 [2]

Answer: Yes.

Step-by-step explanation:

First ratio

5 : 15

Simplify (divide both sides by 5)

1 : 3

Second Ratio

3 : 9

Simplify (divide both sides by 3)

1 : 3

8 0

3 years ago

A real estate agent has 19 properties that she shows. She feels that there is a 30% chance of selling any one property during a

netineya [11]

Answer:

$P(X \geq 5)=1-P(X$

We can find the individual probabilities:

$P(X=0)=(19C0)(0.3)^0 (1-0.3)^{19-0}=0.00114$

$P(X=1)=(19C1)(0.3)^1 (1-0.3)^{19-1}=0.0092$

$P(X=2)=(19C2)(0.3)^2 (1-0.3)^{19-2}=0.0358$

$P(X=3)=(19C3)(0.3)^3 (1-0.3)^{19-3}=0.0869$

$P(X=4)=(19C4)(0.3)^4 (1-0.3)^{19-4}=0.1491$

And replacing we got:

$P(X \geq 5) = 1-[0.00114+0.009282+0.0358+0.0869+0.149]= 0.7178$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=19, p=0.3)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And we want to find this probability:

$P(X \geq 5)$

And we can use the complement rule:

$P(X \geq 5)=1-P(X$

We can find the individual probabilities:

$P(X=0)=(19C0)(0.3)^0 (1-0.3)^{19-0}=0.00114$

$P(X=1)=(19C1)(0.3)^1 (1-0.3)^{19-1}=0.0092$

$P(X=2)=(19C2)(0.3)^2 (1-0.3)^{19-2}=0.0358$

$P(X=3)=(19C3)(0.3)^3 (1-0.3)^{19-3}=0.0869$

$P(X=4)=(19C4)(0.3)^4 (1-0.3)^{19-4}=0.1491$

And replacing we got:

$P(X \geq 5) = 1-[0.00114+0.009282+0.0358+0.0869+0.149]= 0.7178$

4 0

3 years ago

Hey im new, could someone help me???<br> evaluate 3(2)(-1)

asambeis [7]

3(2)(-1)= 3×2×-1= 3×2=6×-1=-6 -6 is the answer

7 0

3 years ago

Read 2 more answers

Write an equation to represent "4 times as many as 3 is 12".

jarptica [38.1K]

4 x 3 = 12
Make sure to give me a thanks!!

3 0

3 years ago

We are interested in conducting a study to determine the percentage of voters of a state would vote for the incumbent governor.

Sidana [21]

Finding the sample size for estimating a population proportion.

The formula is:

n = (z/m)^2 p~(1−p~)

where:
Z is the z value of the confidence level where 95% is equal to 1.96

M is the margin of error where 0.05

And p~ is the estimated value of the proportion where it is 0.50

Solution:

n = (1.96/0.05)^2 (0.5) (1-0.5)

= 1.536.64 (0.5) (0.5)

= 768.32 (0.5)

= 384.16

This is the minimum sample size, therefore we should round it up to 385. The answer is letter c.

6 0

3 years ago