A survey was conducted of 450 high school students asking which class they prefer, math or
history and the data was broken down by grade level.
High School Students' Subject Preferences
Math
History
Total
Freshmen
115
Sophomore
120
Junior
110
Senior
105
Total
450
Part A: If 84 freshmen prefer math, 60 sophomores prefer math, 65 juniors prefer history and 45 seniors prefer history. how many students overall perfer math.
choices:249,144,201,110
part b: What is the marginal relative frequency of those who prefer math?
choices:0.244,0.32,0.447,0.553

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

Which one is true about the hexagons ?

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes