SweetandSour34
SweetandSour34 SweetandSour34
  • 02-05-2018
  • Mathematics
contestada

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

Respuesta :

twvogels
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

A moving company is trying to store boxes in a storage room with a length of 5 m, width of 3 m and height of 2 m. How many boxes can fit in this space if each i
If y=2 when x=3. What is the value of y when x=9?
how does  a star form?
Bethany's dog eats 450 grams of food per day. How many kilograms does the dog eat in a week
Show that 9x^2-17x-85=0 give you solutions to 3 correct significant figures There are two possible answers for x
Show that 9x^2-17x-85=0 give you solutions to 3 correct significant figures There are two possible answers for x
Which one of the following is smallest in size ?N3-               O2-               F-                Na
What type of reaction occurs when you strike a match?
What is the Difference between Research and Investigation???
who decided the election of 1800 and why ?