Difference between revisions of "2013 AMC 10A Problems/Problem 10"
(→Solution 2) |
|||
| (8 intermediate revisions by 5 users not shown) | |||
| Line 7: | Line 7: | ||
| − | ==Solution== | + | ==Solution 1== |
Let the total amount of flowers be <math>x</math>. Thus, the number of pink flowers is <math>0.6x</math>, and the number of red flowers is <math>0.4x</math>. The number of pink carnations is <math>\frac{2}{3}(0.6x) = 0.4x</math> and the number of red carnations is <math>\frac{3}{4}(0.4x) = 0.3x</math>. Summing these, the total number of carnations is <math>0.4x+0.3x=0.7x</math>. Dividing, we see that <math>\frac{0.7x}{x} = 0.7 = \boxed{\textbf{(E) }70\%}</math> | Let the total amount of flowers be <math>x</math>. Thus, the number of pink flowers is <math>0.6x</math>, and the number of red flowers is <math>0.4x</math>. The number of pink carnations is <math>\frac{2}{3}(0.6x) = 0.4x</math> and the number of red carnations is <math>\frac{3}{4}(0.4x) = 0.3x</math>. Summing these, the total number of carnations is <math>0.4x+0.3x=0.7x</math>. Dividing, we see that <math>\frac{0.7x}{x} = 0.7 = \boxed{\textbf{(E) }70\%}</math> | ||
| + | |||
| + | ==Solution 2== | ||
| + | We have <math>\dfrac15</math> for pink roses,<math>1-\dfrac6{10}=\dfrac4{10}=\dfrac25</math> red flowers, <math>\dfrac6{10}-\dfrac15=\dfrac35-\dfrac15=\dfrac25</math> pink carnations, <math>\dfrac25\cdot \dfrac34=\dfrac6{20}=\dfrac3{10}</math> red carnations we add them up to get <math>\dfrac25+\dfrac3{10}=\dfrac7{10}=70\%</math> so our final answer is '''70%''' or <math>\boxed{\textbf{(E) }70\%}</math> | ||
| + | |||
| + | ~jimkey17 from web2.0calc.com, minor edit by flissyquokka17 | ||
| + | |||
| + | ==Video Solution (CREATIVE THINKING)== | ||
| + | https://youtu.be/g084UrFahHU | ||
| + | |||
| + | ~Education, the Study of Everything | ||
| + | |||
| + | |||
| + | |||
| + | ==Video Solution== | ||
| + | https://www.youtube.com/watch?v=2vf843cvVzo?t=290 | ||
| + | |||
| + | ~sugar_rush | ||
==See Also== | ==See Also== | ||
Latest revision as of 00:15, 29 June 2024
Contents
Problem
A flower bouquet contains pink roses, red roses, pink carnations, and red carnations. One third of the pink flowers are roses, three fourths of the red flowers are carnations, and six tenths of the flowers are pink. What percent of the flowers are carnations?
Solution 1
Let the total amount of flowers be 
. Thus, the number of pink flowers is 
, and the number of red flowers is 
. The number of pink carnations is 
and the number of red carnations is 
. Summing these, the total number of carnations is 
. Dividing, we see that 
Solution 2
We have 
for pink roses,
red flowers, 
pink carnations, 
red carnations we add them up to get 
so our final answer is 70% or 
~jimkey17 from web2.0calc.com, minor edit by flissyquokka17
Video Solution (CREATIVE THINKING)
~Education, the Study of Everything
Video Solution
https://www.youtube.com/watch?v=2vf843cvVzo?t=290
~sugar_rush
See Also
| 2013 AMC 10A (Problems • Answer Key • Resources) | ||
| Preceded by Problem 9 |
Followed by Problem 11 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AMC 10 Problems and Solutions | ||
| 2013 AMC 12A (Problems • Answer Key • Resources) | |
| Preceded by Problem 2 |
Followed by Problem 4 |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | |
| All AMC 12 Problems and Solutions | |
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. 
