HELPPPP PLEASEE :A survey was conducted among 100 students of age groups 7-12 years and 13-18 years to find their favorite book genre. The students had to select any one genre out of detective, adventure, and biography. Out of the 50 students in the age group 7-12 years who participated in the survey, 23 liked adventure or biography. The total number of students of both age groups who liked detective books was 28.
Using a two-way table, compute the total number of students in the age group 13-18 years who liked adventure or biography.
23
27
49
51

- anonymous

- schrodinger

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- amistre64

what have you made for a table?

- anonymous

@amistre64 Can you help me make one ?

- amistre64

make a rectangle and subdivide it into 2 rows and 3 columns ... label it.

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## More answers

- amistre64

use the draw button and give it a shot

- anonymous

okay @amistre64

- anonymous

|dw:1432950590967:dw|

- amistre64

|dw:1432950788838:dw|

- amistre64

now what are we told?
Out of the 50 students in the age group 7-12 years who participated in the survey,
23 liked adventure or biography.
out of 50, 23 like a or b, what should we do with these numbers? any ideas?

- anonymous

put them in for a & b on the column

- amistre64

sure, 23 for ab, and 50 for age1 row makes sense
|dw:1432951010408:dw|
now we told
The total number of students of both age groups who liked detective books was 28.
where does 28 go?

- amistre64

lets make a simpler table, same info but aub is one column
|dw:1432951128536:dw|
we can play with this one just the same

- anonymous

|dw:1432951210418:dw|

- anonymous

its goes right there ?

- amistre64

good try but no
The total number of students of both age groups who liked detective books was 28.
the total of d is 28, so the total of the column is 28
|dw:1432951259190:dw|
and we can use x and y for some unknowns.
x is what we want to know, how do you spose we find it now?

- amistre64

x + 23 = y
y + 28 = 100, therefore
x + 23 + 28 = 100, solve for x

- amistre64

|dw:1432951383226:dw|

- amistre64

does it make sense?

- anonymous

yea so it would be 49 ?

- amistre64

23. 28, 40+11 51
100 50
49 ... yep

- anonymous

thanks :)

- amistre64

youre welcome

- anonymous

can you help with another one ?

- amistre64

dunno yet, close this and post a new question. when they pots get long the system starts to freeze up

- anonymous

ok

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