There are four classes of third graders at woodbury elementary school. one class has 24 students, one has 26 students, another has 31 students and the last has 22 students. the principal would like to split the third grade population into two groups for lunch period. which expression represents the separation of the third grade into two groups?
2(24 + 26 + 31 + 22)

b. 24 + 26 + 31 + 22

2

c. (24 + 26) - (31 + 22)

d. 2

24 + 26 + 31 + 22

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:

A50% increase followed by 33 1/2% decrease

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates