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Lesson 9A

lesson9a_files/i0010000.jpg

Calculate the following. Please show all work.            [30 points]
 

 1. 

There were 64 people at a board meeting. If the ratio of men to women was 5:3, how many women were at the meeting?
 

 2. 

At a certain corporation. the ratio of unionized workers to non-unionized is 3 to 7. If a total of 120 people work for that corporation, how many are unionized workers?
 

 3. 

In 2004 there were 801 crimes committed in the 9th precinct. These crimes involved theft, rape, and drugs in the ratio of 3:2:4. How many crimes involved theft?
 

 4. 

Amelia’s pulse rate is 14 beats every 15 seconds. What is her rate in beats per minute?
 

 5. 

Meg died and left $600,000 to her 3 children, Joan, Georgette, and Ray in the ratio of 13:6:1, respectively. How much is Joan’s share?
 

 6. 

A can contains 200 mixed nuts: almonds, cashews, and peanuts. If the probability of choosing an almond is lesson9a_files/i0070000.jpg and the probability of choosing a cashew is lesson9a_files/i0070001.jpg, how many peanuts are in the can?
 

 7. 

A certain triangle has an area of 9 square inches. If its base is 3 inches, what is its height in inches?
 

 8. 

What is the approximate circumference of a circle (to the nearest inch) whose diameter is 14 inches?
 
 
Figure 1
lesson9a_files/i0100000.jpg
 

 9. 

What is the perimeter of the polygon (Figure 1) in inches?
 

Multiple Choice
For questions 16-20, calculate the probability

lesson9a_files/i0120000.jpg
 
 
lesson9a_files/i0130000.jpg
 

 10. 

A spinner has 4 equal sectors colored yellow, blue, green and red. What are the chances of landing on blue after spinning the spinner? What are the chances of landing on red?
a.
lesson9a_files/i0140000.jpg
c.
lesson9a_files/i0140001.jpg
b.
lesson9a_files/i0140002.jpg
d.
lesson9a_files/i0140003.jpg
 
 
lesson9a_files/i0150000.jpg
 

 11. 

If a six-sided die is rolled, what is the probability of a five landing on top?
a.
lesson9a_files/i0160000.jpg
c.
lesson9a_files/i0160001.jpg
b.
lesson9a_files/i0160002.jpg
d.
lesson9a_files/i0160003.jpg
 
 
lesson9a_files/i0170000.jpg
 

 12. 

A glass jar contains 6 red, 5 green, 8 blue and 3 yellow marbles. If a single marble is chosen at random from the jar, what is the probability of choosing a red marble?
a.
lesson9a_files/i0180000.jpg
c.
lesson9a_files/i0180001.jpg
b.
lesson9a_files/i0180002.jpg
d.
lesson9a_files/i0180003.jpg
 

 13. 

A glass jar contains 6 red, 5 green, 8 blue and 3 yellow marbles. If a single marble is chosen at random from the jar, what is the probability of choosing a green marble?
a.
lesson9a_files/i0190000.jpg
c.
lesson9a_files/i0190001.jpg
b.
lesson9a_files/i0190002.jpg
d.
lesson9a_files/i0190003.jpg
 

 14. 

A glass jar contains 6 red, 5 green, 8 blue and 3 yellow marbles. If a single marble is chosen at random from the jar, what is the probability of choosing a blue marble?
a.
lesson9a_files/i0200000.jpg
c.
lesson9a_files/i0200001.jpg
b.
lesson9a_files/i0200002.jpg
d.
lesson9a_files/i0200003.jpg
 

 15. 

A bag contains 105 jelly beans: 23 white, 23 red, 14 purple, 26 yellow, and 19 green ones. What is the probability of selecting either a yellow or a green jelly bean?
a.
lesson9a_files/i0210000.jpg
c.
lesson9a_files/i0210001.jpg
b.
lesson9a_files/i0210002.jpg
d.
lesson9a_files/i0210003.jpg
 



 
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