Among 100 students who enrolled in both math 101 and english 101, 30% of the students scored an a in math 101, 35% of the students scored an a in english 101, and 20% of the students scored an a in both math 101 and english 101. what percentage of the students scored an a in neither math 101 nor english 101?

The percentage of the students scored an A in neither Math 101 nor English 101 is 55%

Step-by-step explanation:

* Lets study the meaning of or , and on probability

- The use of the word or means that you are calculating the probability

  that either event A or event B happened

- Both events do not have to happen

- The use the word and, means that both event A and B have to happen

* The addition rules are:

# P(A or B) = P(A) + P(B) ⇒ mutually exclusive (events cannot happen

  at the same time)

# P(A or B) = P(A) + P(B) - P(A and B) ⇒ non-mutually exclusive (if they  

  have at least one outcome in common)

- The union is written as A∪B or “A or B”.  

- The Both is written as A∩B or “A and B”

* Lets solve the question

- There are 100 student enrolled in both math and English Exams

- 30% of them scored an A in Math

- 35% of them scored an A in English

- 20% of them scored an A in both

- To find the neither lets find either and then subtracted from the total

∵ P(A or B) = P(A) + P(B) - P(A and B)

∵ P(Math) = 30%

∵ P(English) = 35%

∵ P(Math ∩ English) = 20%

∴ P(Math ∪ English) = 30% + 35% - 20% = 45%

- To find the neither subtract either from the total

∵ The total of students who enrolled is 100

∴ The percentage of the students who enrolled is 100%

∴ The percentage of the students scored an A in neither Math nor

   English = 100% - 45% = 55%

* The percentage of the students scored an A in neither Math 101 nor

   English 101 is 55%

answer: there are x+184 pages in olivia's book.

step-by-step explanation:

let the total number of pages in the book which olive has already read be x.

then if olive has 184 pages left to read, then the total number of pages are in olive's book= pages she has read+pages she has left to read

therefore, the total number of pages in olivia's book=

hence, there are x+184 pages in olivia's book.

anser is a

step-by-step explanation:

negitive slope