SOLUTION: Please help me figure this out.
60 students were interviewed and the following info was obtained:
20 own a horse
31 own a cat
32 own a dog
7 own a horse and cat
14 own a
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Systems-of-equations
-> SOLUTION: Please help me figure this out.
60 students were interviewed and the following info was obtained:
20 own a horse
31 own a cat
32 own a dog
7 own a horse and cat
14 own a
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Question 121538: Please help me figure this out.
60 students were interviewed and the following info was obtained:
20 own a horse
31 own a cat
32 own a dog
7 own a horse and cat
14 own a cat and dog
12 own a dog and horse
5 own all three
How many interviewed students didn't own a dog, cat, or horse?
Answers:
a) none
b) 2
c) 3
d) 5
e) 6
You can put this solution on YOUR website! I GET 5 FOR THE ANSWER OF THOSE WHO OWN NO PET.
WE START WITH 60 STUDENTS.
20+31=51 OWN A HORSE & A CAT
51-2*7=51-14=37 OWN A HORSE OR A CAT BUT NO DOG
31+32=63 OWN A CAT & A DOG
63-2*14=63-28=35 OWN A CAT OR DOG BUT NO HORSE
20+32=52 OWN A DOG & A HORSE
52-2*12=52-24=28 OWN A DOG OR HORSE BUT NO CAT
37-3*5=37-15=22
35-3*5=35-15=20
28-3*5=28-15=13
TOTAL=55 MEET ONE OR MORE OF THESE CONDITIONS:
THEREFORE THERE ARE 60-55=5 WHO HAVE NO PET.
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