If you are good at determining sequences please help! (Show work)

a bowl contains 24 marbles consisting of 6 whilte, 8 blue 7 black and 3 red. WHat is the probaility of drawing a black marble?

Anit [1.1K]

Probability helps us to know the chances of an event occurring. The probability of choosing a black marble from the bowl is 0.2917.

<h3>What is Probability?</h3>

Probability helps us to know the chances of an event occurring.

Probability=(Desired Outcomes)/(Total Number of possible outcomes)

The total number of marbles in the bowl is 24, while it contains 6 white, 8 blue, 7 black and 3 red. Therefore, the probability of choosing a black marble from the bowl is,

P(Black marble) = Number of black marble/Number of total Marble

P(Black Marble) = 7/24 = 0.2917

Hence, the probability of choosing a black marble from the bowl is 0.2917.

Learn more about Probability:

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2 years ago

The net of a cone also resembles what other shape?

Vedmedyk [2.9K]

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4 0

3 years ago

Read 2 more answers

The smallest integer that can be added to -2m3 − m + m2 + 1 to make it completely divisible by m + 1 is .

Iteru [2.4K]

Answer:

(-5) is smallest integer to be added.

Step-by-step explanation:

In the given expression we have to identify the smallest integer to be adeed so that it is divisible by (m+1).

If we divide the expression then we get quotient (-2m²+3m-4) and the remainder is +5.

Therefore we can say that if we subtract 5 from the given expression it will be divisible by (m+1).

So the answer is (-5) is the smallest integer to be added.

5 0

3 years ago

A random sample of 49 measurements from one population had a sample mean of 15, with sample standard deviation 5. An independent

kotykmax [81]

Answer:

Comparing the p value with the significance level $\alpha=0.01$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and the difference between the two groups is significantly different.

Step-by-step explanation:

$\bar X_{1}=15$ represent the mean for sample 1

$\bar X_{2}=18$ represent the mean for sample 2

$s_{1}=5$ represent the sample standard deviation for 1

$s_{f}=6$ represent the sample standard deviation for 2

$n_{1}=49$ sample size for the group 2

$n_{2}=64$ sample size for the group 2

$\alpha=0.01$ Significance level provided

t would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the difference in the population means, the system of hypothesis would be:

Null hypothesis: $\mu_{1}-\mu_{2}=0$

Alternative hypothesis: $\mu_{1} - \mu_{2}\neq 0$

We don't have the population standard deviation's, so for this case is better apply a t test to compare means, and the statistic is given by:

$t=\frac{(\bar X_{1}-\bar X_{2})-\Delta}{\sqrt{\frac{s^2_{1}}{n_{1}}+\frac{s^2_{2}}{n_{2}}}}$ (1)

And the degrees of freedom are given by $df=n_1 +n_2 -2=49+64-2=111$

t-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

With the info given we can replace in formula (1) like this:

$t=\frac{(15-18)-0}{\sqrt{\frac{5^2}{49}+\frac{6^2}{64}}}}=-2.897$

P value

Since is a bilateral test the p value would be:

$p_v =2*P(t_{111}$

Comparing the p value with the significance level $\alpha=0.01$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and the difference between the two groups is significantly different.

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3 years ago

Using y = 1 − 2x, plot the ordered pairs from the table. Then graph the function represented by the ordered pairs and tell wheth

svetlana [45]

I think therefore its a linear function

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3 years ago