SOLUTION: In a class, 80 students passed and the rest failed. If 80% of the students failed, find the number of students in the class. Please write down your solution. Two candidates A an

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: In a class, 80 students passed and the rest failed. If 80% of the students failed, find the number of students in the class. Please write down your solution. Two candidates A an      Log On


   

Question 899424: In a class, 80 students passed and the rest failed. If 80% of the students failed, find the number of students in the class. Please write down your solution.
Two candidates A and B ran in an election. A got 46% of the valid votes and was defeated by 1,600 votes. Find the total number of valid votes cast in the election.
My income was increased by 10% and later decreased by 10%. What was the total change in percent in my income.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

20% passed

.20T = 80

   T = 80/.20 = 400 students in the class



.56T - .46T = 1600

    T = 1600/.04



(1.10)(.90) = .99     (decreased by 10%..will receive 90%)

Total change from the b eginning: 1% decrease