chapter 15_3,7,9,17

Problem 3

  1. 52-21=31%

  2. 38+52-21-21=48%

  3. 100-(38+52-21)=31%

Problem 7

  1. 13/26=50%

  2. 100%

  3. 2/26=8%

  4. 33%

Problem 9

  1. Both conditions = 11%

  2. Blood pressure = 11+16=27%

  3. 11/16 = 40%

  4. Given blood, cholesterol = 34%

Problem 17

5 dead batteries, 7 alive, 12 total

  1. 7/12 * 6/11 = 32%

  2. 96%

  3. 7/12 * 6/11 * 5/10 * 4/9 = 7%

  4. 0.9%