Question

May I have some help?


Out of the 150 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?

Answer 1

I just need someone to help me through the process, it's a little difficult.

Answer 2

Here are the choices:

45%

68%

28%

42%

Answer 3

@niksva what do you think the answer is? I say the answer's 42%.

Answer 4

@Loser66 May I please have some help?

Answer 5

@ranga May I have some help?

Answer 6

how did u get 42%?

Answer 7

I added 72 + 13 + 23 = 108, and then I added 42 to 108 and got 150.

Answer 8

@phi may I have some help?

Answer 9

May I have some help @Agent47

Answer 10

the method which i m using on the basis of
P(T union C) = P(T) + P(C) - P(T intersection C)
where T is trekking and C is canoeing

Answer 11

So, it's not 42. What's the answer you got then? :-)

Answer 12

after using this method i m getting
P( T union C) = 46%
in order to determine people not signed up for canoeing and trekking
P = (100- 46)%
= 54%

Answer 13

Sadly, that's not one of the choices. :(

Answer 14

yay thats not in the choices

Answer 15

So, what would you get for your answer out of the 4 choices:

45%

68%

28%

42%

Answer 16

hello

Answer 17

@phi

Answer 18

@ganeshie8

Answer 19

i m getting 54%

Answer 20

@ganeshie8

Answer 21

The Joint Relative Frequency = the proportional values in the interior of the table.

JRF = Joint frequency
__________________
total size of sample

13
___
150 ???

Answer 22

WAIT

Answer 23

42 over 150 and you get 0.28, move the decimal over 2 places, and you get 28%.

Answer 24

I got 42 by: 150 - 72 - 23- 13 = 42

Answer 25

What do you think?

Answer 26

how do you keep getting 45

Answer 27

in this ques it has been said 13 of those students
so it means that out of 23 students , 13 students signed up for canoeing too
m i interpreting this right or not?

Answer 28

Right

Answer 29

then i m getting 54 %

Answer 30

Did you divide the answer by 150?

Answer 31

yup i did

Answer 32

so what was it? @niksva @grama-pimpsta

Answer 33

The numbers 72 23 and 13 are just there to confuse you. If you add them all together, you get 108. You now just have to subtract 108 from 150. Now you get 42, and 42% is one of the choices, but it is also there to trick you. You have the number, not the percent. You just have to find what percent is 42 out of 150. That would be 28% or C. :)

Answer 34

@Grama-Pimpsta @niksva @zion_15