Consider the students in your statistics class as the population and suppose they are seated in four rows of 10 students each. to select a sample, you toss a coin. if it comes up head, you use the 20 students siting in the first two rows as your sample. if it comes up tails, you can use the 20 students sitting in the last two rows as your sample.

a. does every students have an equal chance of being selected for the sample? explain

b. is it possible to include students sitting in row 3 with students sitting in row 2 in your sample? is your sample a simple random sample? explain.

c. describe a process you could use to get a simple random sample of size 20 from a class of size 40.

answer is x<

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

answer: 486in^2

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."