Question

pre algerbra kinda difficult

Answer 1

A group of students were surveyed to find out if they like watching television or reading during their free time. The results of the survey are shown below:

90 students like watching television
20 students like watching television but do not like reading
80 students like reading
40 students do not like watching television

Make a two-way table to represent the data and use the table to answer the following questions.

Part A: What percentage of the total students surveyed like both watching television and reading? Show your work. (5 points)

Part B: What is the probability that a student who does not like watching television also does not like reading? Explain your answer. (5 points)

Answer 2

here is a example of the chart its talking about

Answer 3

get your total number of students

Answer 4

230

Answer 5

how many of them like watching tv and reading?

Answer 6

180

Answer 7

check again

Answer 8

170 my bad

Answer 9

yeah

Answer 10

so now find the percentage

Answer 11

170/230 right?

Answer 12

74%

Answer 13

correct so far but,
you have to multiply by something

Answer 14

i dont remember what

Answer 15

that is correct

Answer 16

oh ok

Answer 17

think of it like this

Answer 18

230 is to 100% and 170 is to what?

Answer 19

one way of thinking of it
100% %
---- = --
230 170

Answer 20

therefore % of 170 is

170
% = --- 100
230

Answer 21

i use to do this thing that had all my teachers mad at me but i always got the right answer that was like this

100% = 230
50% = 115
10% = 23
5% = 11.5
1% = 2.3

then you can add the numbers together until you get 170 and then add the percentages of what you used.....


but moving on lol

Answer 22

that method also works but is lengthy and tedious

Answer 23

i do it all in my head so it isnt that hard to me

Answer 24

you are good

Answer 25

but also consider the method i showed you, its shorter

Answer 26

ok

Answer 27

you can also be given fractions instead of whole numbers, or maybe other stuff like formulas

Answer 28

so your way would be easier to use that way

Answer 29

can you help me with part B aswell

Answer 30

@jonm111 u still there m8

Answer 31

ooh right, sorry i will look at it

Answer 32

its ok

Answer 33

hmm interesting, the problem implies there were 4 seperate groups of students but question b implies there are groups within groups and coincidentally so does the picture you posted.

Answer 34

thats what really confused me

Answer 35

could the question instead be

90 students like watching television and 20 of them don't like reading
80 students like reading and 40 of them don't like watching television

this would make more sense, according to the question and the diagram you posted

Answer 36

i think we should take it the way your saying

Answer 37

oh i see in total there is 130 people

Answer 38

i dont know how you arrived to that, the question is misleading.