SweetandSour34 SweetandSour34

02-05-2018
Mathematics

contestada

21 marbles out of N are blue; probability of getting a blue one = 30%

Respuesta :

twvogels twvogels

02-05-2018

[tex]Probability=\frac{desired}{total}[/tex]
[tex]0.3=\frac{21}{N}[/tex]
[tex]0.3N=21[/tex]
[tex]N=\frac{21}{0.3}[/tex]
[tex]N=70[/tex]

There are 70 total marbles.

Answer Link

Otras preguntas

What is the BEST strategy to improve flexibility in your legs and back?

If an animal has a set of organs held together and protected by surrounding fluid, the animal is a _____. acoelomate pseudocoelomate coelomate

Being a member of a gang is necessary if you want to feel safe. a. True b. False

Write an equivalent expression for 8+7y+2x+4y+4

25d-14d+8d=95 whats the value of d and show work

(please help me. ) (I screenshot the question and choices )

What is a sedentary lifestyle?

What is the volume of the cube? Solid Figures, Part 1 A. 225 mm3 B. 3375 mm3 C. 1350 mm3 D. 45 mm3one side of the is 15

What is the function of a diaphragm in a film camera? A. It directs the image to the viewfinder. B. It focuses incoming light rays. C. It opens the shutter.

Which layer of the Earth is composed of iron and nickel, and has two main parts called the outer ___________ and the inner ___________ ? a. the mantle c. the cr