Employment data at a large company reveal that 75% of the workers are married, 42% are college graduates, and half of the college grads are married. Complete parts a through c below.

a) What's the probability that a randomly chosen worker is neither married nor a college graduate? (Type an integer or a decimal. Do not round.)
b) What's the probability that a randomly chosen worker is married but not a college graduate? (Type an integer or a decimal. Do not round.)
c) What's the probability that a randomly chosen worker is married or a college graduate? (Type an integer or a decimal. Do not round.)

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Name and describe the three most important measures of central tendency. choose the correct answer below. a. the mean, sample size, and mode are the most important measures of central tendency. the mean of a data set is the sum of the observations divided by the middle value in its ordered list. the sample size of a data set is the number of observations. the mode of a data set is its highest value in its ordered list. b. the sample size, median, and mode are the most important measures of central tendency. the sample size of a data set is the difference between the highest value and lowest value in its ordered list. the median of a data set is its most frequently occurring value. the mode of a data set is sum of the observations divided by the number of observations. c. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is the product of the observations divided by the number of observations. the median of a data set is the lowest value in its ordered list. the mode of a data set is its least frequently occurring value. d. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is its arithmetic average. the median of a data set is the middle value in its ordered list. the mode of a data set is its most frequently occurring value.

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me