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6 Cards in this Set
- Front
- Back
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This year, Central High School has 1,000 students. If the enrollment next year is 650, what is the percent decrease. |
Change/Original 1. 1,000 - 650 = 350 2. 350 - - - - 1,000 35% |
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What is the percent increase of John's salary if it went from $150 a month to $200 a month? |
33 1/3% |
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If an ordinary die is cast twice, what is the probability that the sum is 10? |
Favorable Outcomes ------------------------------ Total Outcomes 5+5 6+4 4+6 3/36 = 1/12 |
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A class of 25 students, including Phil took a math test. Phil was the only student who scored 90%. If 5 students had a higher score than Phil, what percent of the class scored lower than Phil. |
- Phil was the only student to score 90%, so there are 24 students who scored either higher or lower than Phil. - Since 5 students scored higher than Phil, 24 - 5 = 19 - 19/25 = 75% |
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In a math class, there are 18 boys and 12 girls. On a particular exam, 50% of the boys and 75% of the girls earned passing grades. What percent of the entire class earned passing grades? |
- The number of boys who passed the exam is (.50) x (18) = 9 - The number of girls who passed the exam is (.75) x (12) = 9 - This means that out of 30 students in the class, 18 students passed the exam. - 18/30 =. 60 = 60% |
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Mr. Smith died and left his estate to be divided among his wife, daughter, and a charity at a ratio of 6:2:1. The estate is valued at $180,000. How much will his daughter receive? |
- There are a total of [6+2+1] = 9 equal shares of the $180,000 estate to be divided up. Each share is worth $180,000 - $180,000/9 = $20,000 - Thus the daughter will receive 2 shares that have a total of: $40,000 |
