Slices of pizza for a certain brand of pizza have a mass that is approximately normally distributed with a mean of 67.1 grams and a standard deviation of 1.83 grams. 1. What is the probability of finding a random slice of pizza with a mass of less than 66.8 grams?
2. What is the probability of finding a 18 random slices of pizza with a mean mass of less than 66.8 grams?
3.What sample mean (for a sample of size 18) would represent the bottom 15% (the 15th percentile)?

207/8 is the right

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!