ZenaidaWillert234 ZenaidaWillert234
  • 20-09-2015
  • Mathematics
contestada

Thirty percent of all the students in a school are in a Play. All except for 140 students are in the play. How many students are in the school?

Respuesta :

WorldCitizen WorldCitizen
  • 25-09-2015
Well, if 30% of students are in the play then 100%-30% = 70% of students are not in the play, which is also 140.

So we know:

70%*x=140

70% is also 7/70:

[tex] \frac{7}{10} x=140[/tex]

divide both sides by 7 and multiply by 10:

x=20*10

x=200

there are 200 students in the school
Answer Link

Otras preguntas

Which 1773 event was an american response to british duties placed on imported goods? a. continental congress b. boston tea party c. battle of lexington d.
Based on this stanza, how do the speaker’s parents feel about her decision to pursue book publishing?
M is between L and C. LM=11, MC=2x+5, and LC= 6x-6. What is MC?
What happens when an electron moves from a high energy level to a lower one? A. it absorbs light B. it emits light C. it disappears D. it gets bigger
You can italicize a word by selecting it and clicking the italics icon. what keyboard shortcut could you use instead of clicking the icon?
Shaking a soda causes bubbles of gas to escape the solution. Which factor does this scenario demonstrate?
Evaluate -3+y/5 when y= -2.5
Which of the following sample spaces correctly lists all the possible outcomes for flipping a coin and spinning a four-colored spinner (red, blue, green, and ye
Which of the following are complete protein
A rectangular plot of farmland will be bounded on one side by a river and on the other three sides by a​ single-strand electric fence. With 600 m of wire at you