Let x = the number of typos per page in the rough draft of a particular book. suppose that x follows a poisson distribution and that, on average, it has one typo every four pages so that  = 0.25. use the probability mass function to find each of the following. (a) find the chance that a randomly selected page has no typos. (b) find the chance that a randomly selected page has at most one typo. (c) suppose that three pages are selected independently of each other. find the chance that none of them have any typos.

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24