Out of the 180 students at a summer camp, 72 signed up for canoeing. There were 23 students who signed up for trekking and 13 of those students also signed up for canoeing.
Use a two-way table to organize the information and answer the following question:

Approximately what percentage of students signed up for neither canoeing nor trekking?

A. 72%
B. 40%
C. 54%
D. 98%

Question

Out of the 180 students at a summer camp, 72 signed up for canoeing. There were 23 students who signed up for trekking and 13 of those students also signed up for canoeing.
Use a two-way table to organize the information and answer the following question:

Approximately what percentage of students signed up for neither canoeing nor trekking? 

 	
	A. 72%
	B. 40%
	C. 54%
	D. 98%

anonymous · Answer

help?!

miracrown · Answer

Just so I'm using the same notation as your teacher,
can you show me what your standard 2-way table looks like?

miracrown · Answer

I can draw the table if you wish,
but if it doesn't look familiar to you, please let me know.

anonymous · Answer

Im not sure and ok thanks

miracrown · Answer

|dw:1404104166065:dw|

miracrown · Answer

We'll fill out this table a step at a time.

miracrown · Answer

to start, we have 72 students who signed up for canoeing, but apparently don't want to trek (hike)

miracrown · Answer

|dw:1404104378529:dw|
Let's call this group 1:

miracrown · Answer

|dw:1404104402054:dw|

miracrown · Answer

For the 2nd group of students, 23 of them what to go trekking.
And of this group of 23, 13 also want to go canoeing.

miracrown · Answer

|dw:1404104482321:dw|