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3 years ago

Two students can eat

Mathematics

1 answer:

Rainbow [258]3 years ago

5 0

Answer:

Hmmmmmm

Step-by-step explanation:

123 abc you and me now

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Why do people answer my question if they dont know the answer?

Bogdan [553]

Because people want points, so they answer as many questions as they can... it's quite stupid (and annoying), if you ask me.

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3 years ago

Read 2 more answers

About 11% of adult Americans are left-handed. Suppose that two people are randomly selected from this

marshall27 [118]

Answer:

a) $P(X=0)=(2C0)(0.11)^0 (1-0.11)^{2-0}=0.7921$

$P(X=1)=(2C1)(0.11)^1 (1-0.11)^{2-1}=0.1958$

$P(X=2)=(2C2)(0.11)^2 (1-0.11)^{2-2}=0.0121$

And then we have our probability distribution like this:

X | 0 | 1 | 2 |

P(X) | 0.7921 | 0.1958 | 0.0121|

b) $P(X \geq 1) = P(X=1)+P(X=2) = 0.1958+0.0121=0.2079$

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".

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

$X \sim Binom(n=20, p=0.48)$

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:

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

Solution for the problem

Part a

On this case since we select a sample size of n =2 we have the following values for the number of left handed X=0,1,2. We can find the probabilities for each case since we know that p=0.11.

$P(X=0)=(2C0)(0.11)^0 (1-0.11)^{2-0}=0.7921$

$P(X=1)=(2C1)(0.11)^1 (1-0.11)^{2-1}=0.1958$

$P(X=2)=(2C2)(0.11)^2 (1-0.11)^{2-2}=0.0121$

And then we have our probability distribution like this:

X | 0 | 1 | 2 |

P(X) | 0.7921 | 0.1958 | 0.0121|

Part b

For this case we want this probability:

$P(X \geq 1) = P(X=1)+P(X=2) = 0.1958+0.0121=0.2079$

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3 years ago

In △QRS, line QR≅line SQ and m∠Q=114∘. find m∠S

JulsSmile [24]

Answer:

prove that lines AK and AL divide BC into three equal parts. 1.30. Point O is the center of the circle inscribed in △ABC. On sides AC and BC points M and K, ...

Step-by-step explanation:

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3 years ago

A rectangular garden has a walkway around it. The area of the garden is 6(3.5x+2.5) The combined area of the garden and the walk

amid [387]

First terms answer is=39x+39
Second term answer is=90x+15
Check it out how I solved and your welcome:D

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3 years ago

Problem 1:

kondor19780726 [428]

Answer:

1) The variable is x

2) $1.5x > 51$ Solving the inequality we get x>34

3) $5b > 51$ , solving the inequality we get b>10.2

Step-by-step explanation:

1. Define the variable:

The variable is x

2) Trini needs more than 51 cubic feet of soil to top up his raised garden. Each bag of soil contains 1.5 cubic feet. Write and solve an inequality to find how many bags of soil Trini needs.

$1.5x > 51$

Solving the inequality

$x>\frac{51}{1.5}\\x>34$

Solving the inequality we get x>34

3) Write the inequality:

5 times b greater than 51

$5b > 51$

4) Solving the inequality

$5b > 51\\b>\frac{51}{5}\\b>10.2$

So, solving the inequality we get b>10.2

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3 years ago