The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of chips and standard deviation chips. Required:
a. What is the probability that a randomly selected bag contains between and chocolate chips, inclusive?
b. What is the probability that a randomly selected bag contains fewer than chocolate chips?
c. What proportion of bags contains more than chocolate chips?
d. What is the percentile rank of a bag that contains chocolate chips?

Explained below.

Step-by-step explanation:

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1262 chips and standard deviation 118 chips.

(a)

Compute the probability that a randomly selected bag contains between 1000 and 1400 chocolate chips as follows:

Thus, the probability that a randomly selected bag contains between 1000 and 1400 chocolate chips is 0.8658.

(b)

Compute the probability that a randomly selected bag contains fewer than 1000 chocolate chip as follows:

Thus, the probability that a randomly selected bag contains fewer than 1000 chocolate chip is 0.0132.

(c)

Compute the proportion of bags that contains more than 1200 chocolate chips as follows:

Thus, the proportion of bags that contains more than 1200 chocolate chips is 0.2981.

(d)

Compute the percentile rank of a bag that contains 1125 chocolate chips as follows:

Thus, the percentile rank of a bag that contains 1125 chocolate chips is 12.3rd.

the answer is. -82562234434584

step-by-step explanation:

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3