Assume there are n students in the class. Each student is assigned a seat labeled from 1 to n. The students walk into the classroom according to their seat numbers, i. e., the student assigned seat 1 walks in first and n last. If a student finds the seat assigned to him is occupied, he will select a seat from currently empty seats uniformly at random. If the first student forgets his seat number, which means the student will select a seat from all empty seats uniformly at random, what is the probability that the nth student still sits in his seat?

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave

The total number of dental clinics total for the last 12 months was recorded