The ratio of boys to girls in Ms. Prado's class is 3 to 2. Which of the following could be the number of boys and girls in her class? Selected:
a. 6 boys and 8 girls
b. 18 boys and 12 girls
c. 9 boys and 4 girls
d. 10 boys and 2 girls

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2