Sajjad1994 wrote:
The accompanying chart shows the % of petty crimes in Keono that took place at various distances from Central Square.
From each drop down menu, select the option that provides the most accurate statement based on the information given.1. If there were 150% more crimes committed in 2007 than in 2004, the number of crimes committed more than one mile from 1 Central Square in 2007 is approximately_____________% of the number of crimes committed more than one mile from 1 Central Square in 2004.A. 54%
B. 154%
C. 200%
D. 300%
2. If there were 400 crimes committed in 2002, how many more crimes would need to be committed more than one mile from the city center for the number of these crimes to double the number of crimes committed less than 1/2 of a mile from the city center?A. 63
B. 128
C. 252
D. 360
1. If there were 150% more crimes committed in 2007 than in 2004, the number of crimes committed more than one mile from 1 Central Square in 2007 is approximately_____________% of the number of crimes committed more than one mile from 1 Central Square in 2004.A. 54%
B. 154%
C. 200%
D. 300%
SOLUTION:
Let the total number of crimes in 2004 = \(x\)
Therefore, total number of crimes in 2007 = \(\frac{150}{100} * x = 1.5x\)
Number of crimes more than 1 mile from CS in 2007 = \(\frac{36}{100} * 1.5x\)
Number of crimes more than 1 mile from CS in 2004 = \(\frac{27}{100} * x\)
Crimes more than 1 mile away in 2007 / Crimes more than 1 mile away in 2004 = \(\frac{0.36*1.5x}{0.27*x} = 2 = 200%\)
Answer: C2. If there were 400 crimes committed in 2002, how many more crimes would need to be committed more than one mile from the city center for the number of these crimes to double the number of crimes committed less than 1/2 of a mile from the city center?A. 63
B. 128
C. 252
D. 360
Total crimes in 2002 = 400
No. of crimes less than 0.5 mile = \(\frac{45}{100} * 400 = 180\)
No. of crimes between 0.5 to 1 mile = \(\frac{28}{100} * 400 = 112\)
No. of crimes more than 1 mile = \(\frac{27}{100} * 400 = 108\)
Now, as per question
We need to determine a number, which when added to Number of crimes more than 1 mile, doubles the number of crimes less than 1/2 mile from city center
Let the number to be added be x
\(108 + x = 2*180\)
\(x = 360 - 108 = 252\)
Answer - C