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

Sometimes it can be difficult to measure unemployment in an economy because some people who have been actively looking for jobs may be discouraged to do so afte

It was a mine town, uranium most recently. Dust devils whirled sand off the mountains. Even after the heaviest of rains, the water seeped back into the ground,

Which of the following is NOT true of the Dutch regarding religious practices in their New World colonies?

What is the next number 6,12,15,60,65,?

The sum of three numbers is 675 400. The first two numbers are 44 500 and 73 819. What is the third number?

evaluate the expression when n=5 n^(2)-6n+6

You have decided to take up carpentry and build your mother a set of shelves. However, you have not refined your skills very well and while sanding the shelves

What is the next number 6,12,15,60,65,?

a3 -a2 b2 +b3 when a=(-2) and b=(-1)

what is the approximate value of 9/11-4/9