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luke3416
25.11.2019 •
Mathematics
Answer the all of the following questions, i will give you brainliest and ! i want to see if you guys know it.
1. 15% of my candies were strawberry candies. i had 30 strawberry candies. how many candies did i have?
2. 54 students failed a math test. this is 27% of the total number of students. how many students passed the test?
3. mike and mandy bought the same item. mike paid $15,000, but mandy paid inly $12,000. how much discount did mandy get (in percents)?
**write your work, so i know you guys didn't cheat. i ain't giving brainliest to someone without one**
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Ответ:
1) 200 candies
15% of my candies were strawberry candies. I had 30 strawberry candies. How many candies did i have?
Let "x" be the number of candies.
Equation:
0.15x = 30
x = 30/0.15
---
Multiply numerator and denominator by 100 to get:
x = 3000/15
x = 200
2) 146 STUDENTS
27%*T=54, So T=200.
So 200-54=146 Students passed the test.
3) She got a 20% discount (or 80% discount). (Work shown for 80%).
First you have to find out how much Mandy paid. So from 15000 you will subtract 3000. 15000-3000=12000.
Next you need to set up your equation. . You then have to cross multiply. So 100 times 12000, 100*12000=1200000. And 15000 times x is 15000x. Finally you divide both sides by 15000. And 1200000 divided by 15000 is 80. X=80
Step-by-step explanation:
Ответ:
P(x=4) = 5C4(0.12)^4(0.88)^1 = 5*(0.00030736)(0.88) = 0.000912384..