Question 1203012
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Starting template
<table border = "1" cellpadding = "5"><tr><td></td><td>Car</td><td>Bus</td><td>Bicycle</td><td>Total</td></tr><tr><td>Male</td><td></td><td></td><td></td><td></td></tr><tr><td>Female</td><td></td><td></td><td></td><td></td></tr><tr><td>Total</td><td></td><td></td><td></td><td></td></tr></table>


The first two pieces of info are:
42 teachers total
20 are male


This means the remaining 42-20 = 22 teachers are female.


We'll have the numbers 20, 22, 42 along the "total" column
<table border = "1" cellpadding = "5"><tr><td></td><td>Car</td><td>Bus</td><td>Bicycle</td><td>Total</td></tr><tr><td>Male</td><td></td><td></td><td></td><td>20</td></tr><tr><td>Female</td><td></td><td></td><td></td><td>22</td></tr><tr><td>Total</td><td></td><td></td><td></td><td>42</td></tr></table>


Let's move to the next bit of given information:
Five of the male teachers and three female teachers cycle to school


This means we write "5" in the "male" row and "bicycle" column, as well as "3" just directly underneath that "5".
This totals to 5+3 = 8 teachers who travel using a bicycle.
<table border = "1" cellpadding = "5"><tr><td></td><td>Car</td><td>Bus</td><td>Bicycle</td><td>Total</td></tr><tr><td>Male</td><td></td><td></td><td>5</td><td>20</td></tr><tr><td>Female</td><td></td><td></td><td>3</td><td>22</td></tr><tr><td>Total</td><td></td><td></td><td>8</td><td>42</td></tr></table>


Move onto the next bit of info
17 of the teachers travel to school by bus
We'll write "17" at the bottom of the "bus" column.
<table border = "1" cellpadding = "5"><tr><td></td><td>Car</td><td>Bus</td><td>Bicycle</td><td>Total</td></tr><tr><td>Male</td><td></td><td></td><td>5</td><td>20</td></tr><tr><td>Female</td><td></td><td></td><td>3</td><td>22</td></tr><tr><td>Total</td><td></td><td>17</td><td>8</td><td>42</td></tr></table>


Along the bottom row we have
x+17+8 = 42
where x is the total who drive a car


Solve that equation to get x = 17
There are 17 teachers that use a car
<table border = "1" cellpadding = "5"><tr><td></td><td>Car</td><td>Bus</td><td>Bicycle</td><td>Total</td></tr><tr><td>Male</td><td></td><td></td><td>5</td><td>20</td></tr><tr><td>Female</td><td></td><td></td><td>3</td><td>22</td></tr><tr><td>Total</td><td>17</td><td>17</td><td>8</td><td>42</td></tr></table>

Then we're told "10 of the female teachers travel to school by car"
As you can probably guess, we'll have "10" in the "female" row and "car" column.
<table border = "1" cellpadding = "5"><tr><td></td><td>Car</td><td>Bus</td><td>Bicycle</td><td>Total</td></tr><tr><td>Male</td><td></td><td></td><td>5</td><td>20</td></tr><tr><td>Female</td><td>10</td><td></td><td>3</td><td>22</td></tr><tr><td>Total</td><td>17</td><td>17</td><td>8</td><td>42</td></tr></table>
I'll let the student fill in the remaining empty boxes.
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