Mathematics, 07.08.2019 00:10 arnold2619

An urn contains balls numbered 1 through 20. a ball is chosen, returned to the urn, and a second ball is chosen. what is the probability that the first and second balls will be a 8?

Answers: 1

Show answers

Answers

Answer from: kaliebeckp8vqrs

The probability is:

$\dfrac{1}{400}$

Step-by-step explanation:

It is given that:

An urn contains balls numbered 1 through 20.

A ball is chosen, returned to the urn, and a second ball is chosen.

This means that this is a case of a replacement.

Hence, one of the event is independent of the other.

Now we know that the probability to get a particular number of ball is:

$\dfrac{1}{20}$

( Since, there are total 20 balls and a ball of one particular number is just unique )

i.e. $\text{Probability of getting a 8}=\dfrac{1}{20}$

Hence, the probability that the first and second balls will be a 8 is:

$=\dfrac{1}{20}\times \dfrac{1}{20}\\\\\\=\dfrac{1}{400}$

Answer from: alejachico2

An urn contains balls numbered 1 through 20. A ball is chosen, returned to the urn, and a second ball is chosen. The probability that the first and second balls will be a 8 is $\frac{1}{400}$

Further explanation

A random variable, random quantity, aleatory variable, or stochastic variable is described as a variable that the values depend on outcomes of a random phenomenon. The formal mathematical treatment of random variables is a topic in probability theory

There are two types of random variables such as discrete and continuous. Random variables can assume only a countable number of values are called discrete. Whereas the random variables that can take on any of the countless number of values in an interval are called continuous.

The chance of the first ball being a is $\frac{1}{20}$ . Similarly, the chance of the second being a is $\frac{1}{20}$ .

To find the chance if both happening, muliply the two.

$\frac{1}{20}$ * $\frac{1}{20}$ = $\frac{1}{400}$

Because since you return it $\frac{1}{20}$ again and those combined make $\frac{1}{400}$ since 20 * 20= 400

Learn moreLearn more about urn Learn more about probability ball Learn more about probability Answer details

Grade: 9

Subject: mathematics

Chapter: probability

Keywords: urn, balls, probability, second, first

Answer from: Quest

step-by-step explanation:

dong do iy iys a scram

Answer from: Quest

step-by-step explanation:

1. the cylinder is a. 54

2. a.108 /

Another question on Mathematics

Mathematics, 21.06.2019 19:30

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

Answers: 1

Answer

Mathematics, 21.06.2019 19:50

Solve the equation by completing the square. x^2+2x=17

Answers: 2

Answer

Mathematics, 21.06.2019 22:30

Select all of the following expressions that are equal to 2.5.

Answers: 3

Answer

Mathematics, 22.06.2019 00:00

Layla answer 21 of the 25 questions on his history test correctly.what decimal represents the fraction of problem he answer incorrectly.