There are 213 students in the school. 89 students take humanities, 85 students take geometry, 83 students take computer science, and 77 students take chemistry. 28 students take both humanities and chemistry, 46 students take both humanities and geometry, 40 students take both geometry and computer science, and 30 students take both chemistry and computer science.15 students take humanities, chemistry and geometry, 16 students take humanities, geometry and computer science, 8 students take geometry, computer science and chemistry, and 12 students take computer science, chemistry and humanities. There are no students who take only humanities and computer science, and no students who take only geometry and chemistry. There are only 5 students who take all 4 classes. How many students take none of the classes?

According to the normal model, what percent of receivers would you expect to gain fewer yards than 2 standard deviations below the mean number of yards

In tossing one coin 10 times, what are your chances for tossing a head? a tail? 2. in tossing one coin 100 times, what are your chances for tossing a head? a tail? 3. in tossing one coin 200 times, what are your chances for tossing a head? a tail? deviation = ((absolute value of the difference between expected heads and observed heads) + (absolute value of the difference between expected tails and observed tails)) divided by total number of tosses. this value should always be positive. 4. what is the deviation for 10 tosses? 5. what is the deviation for the 100 tosses? 6. what is the deviation for 200 tosses? 7. how does increasing the total number of coin tosses from 10 to 100 affect the deviation? 8. how does increasing the total number of tosses from 100 to 200 affect the deviation? 9. what two important probability principles were established in this exercise? 10. the percent of occurrence is the obtained results divided by the total tosses and multiplied by 100%. toss the coins 100 times and record your results. calculate the percent occurrence for each combination. percent head-head occurrence: percent tail-tail occurrence: percent head-tail occurrence:

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60