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4 years ago

A bag contians 5 blue and 8 red and 7 green marbels. A marble is selacted at random. Find the propobility the marbelis not red.

Mathematics

2 answers:

matrenka [14]4 years ago

6 0

Answer:

33%

Step-by-step explanation:

This is because there are three different types and 33 x 3 = 99 and that is close to 100%.

sammy [17]4 years ago

3 0

Total number of marbles = 5 + 8 + 7 = 20

Total number of non-red marbles = 5 + 7 = 12

P(not red) = 12/20 = 3/5

Answer: 3/5

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Area of a trapezium

melamori03 [73]

Answer:

The area of a trapezium is computed with the following formula: Area = 1 2 × Sum of parallel sides × Distance between them.

Step-by-step explanation:

Hope it help! :)

7 0

3 years ago

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A pyramid has a square base with edges that measure 6 meters, and a slant height of 7.5 meters. What is its surface area?

slava [35]

The area of base:

$B=6^2=36\ m^2$

The area of one side:

$S=\dfrac{1}{2}\cdot6\cdot7.5=22.5\ m^2$

The surface area:

$SA=B+4S\to SA=36+4\cdot22.5=126\ m^2$

3 0

3 years ago

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Three years ago, the mean price of an existing single-family home was $243 comma 772. A real estate broker believes that exis

jarptica [38.1K]

Answer:

(a)

$\mathbf{H_0: p=\$243,772\\H_1: p$

(b) The broker rejects the hypothesis that the mean price is $243,772, when it is the true mean cost.

(c) The broker fails to reject the hypothesis that the mean price is $243,772, when the true mean price is less than $243,772.

Step-by-step explanation:

(a) The null and alternative hypotheses are:

$H_0: p=\$243,772\\H_1: p$

(b) The type I error says that reject the $H_0$ when it is true.

Thus, type I error is: The broker rejects the null hypothesis that the mean price of home is $243,772, when it is the true mean cost.

(c) The type II error says that accept the $H_0$ when it is false.

Thus, type II error is: The broker fails to reject the null hypothesis that the mean price of single-single home is $243,772, when the true mean price is less than $243,772.

8 0

3 years ago

Five years ago alex was 12 times as old as tom alex is 41 now how old is tom now

anastassius [24]

Step-by-step explanation:

I think this will help you. Thanks.

8 0

3 years ago

The difference between two numbers is 2811.

madreJ [45]

The smaller number is 1389. We get this by using the technique of subtracting the bigger from the smaller number and equate it to the difference product.

Given the difference between two numbers is 2811.

The bigger number is 4200.

The smaller number is = ?

let the smaller number be 'x'

as the statement says difference between two numbers = 2811

Subtract the largest number from the smallest number to determine the difference between two integers. This sum is a product, and the difference between the two values is the product.

⇒ bigger number ₋ smaller number = 2811

⇒ 4200 ₋ x = 2811

⇒ ₋ x = 2811 ₋ 4200

⇒ ₋ x = ₋ 1389

cancel the negative sign from both sides.

x = 1389

hence we get the smaller number as 1389.

Learn more about Subtraction here:

brainly.com/question/17301989

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#SPJ9

6 0

2 years ago