BlueMoonII
contestada

There are 20 cars in my building's parking lot. All of the cars are red or white. Also, all the cars are either 2-door or 4-door. 12 of them are red, 15 of them are 4-door, and 4 of them are 2-door and white. How many of the cars are 4-door and red?

Respuesta :

frika

Answer:

11 cars

Step-by-step explanation:

There are 20 cars in my building's parking lot, 15 cars are 4-door, then

[tex]20-15=5[/tex] cars are 2-door.

5 cars are 2-door, 4 of them are 2-door and white, then

[tex]5-4=1[/tex] car is 2-door and red.

12 cars are red, 1 car is 2-door and red, then

[tex]12-1=11[/tex] cars are 4-door and red.

Athenalsun

(1/3) are red  =  30 *1/3  = 10 are red

So...20  are white

50% are 4 door   = 15  are 4 door

So....15 are 2 door

8 are 2 door  and white.....so 12 are 4 door and white  since we have 20 white total

And since 15 are 4 door  and 12 of these are white...then 3 must be 4 door and red

ORRRR

Make a two-way table as follows:

                                           RED                            WHITE

2-DOOR                               7                                        8

4-DOOR                               3                                      12

TOTALS                               10                                     20

 So, it looks like you have 3 cars that are red and have 4 doors.

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