Friday

August 22, 2014

August 22, 2014

Posted by **Christopher** on Friday, May 30, 2014 at 12:51am.

How do we solve these ones? Hints please...

- Math -
**Steve**, Friday, May 30, 2014 at 11:52amDraw a Venn diagram. Look for the intersections.

For this problem, let the two circles represent how many people eat meat an d fish, respectively.

In this case, 2 eat both.

So, put a 2 in the place where the two circles intersect.

Now, since we know that 6 eat meat, and we've already determined that 2 eat both, that means that 4 eat**only**meat. Put a 4 in the meat circle, outside the intersection.

Now, do the same for the fish circle. Place a 3 in the fish-only part of the circle.

Now we see that there are 4+2+3=9 people altogether.

Or, algebraically, if you just add up the meat and fish numbers, you get 6+5=11 people. But note that you've counted the meat&fish people twice, so the actual population is 6+5-2=9

In set notation,

|AUB| = |A| + |B| - |A∩B|

- Math -
**Christopher**, Friday, May 30, 2014 at 12:28pmAlright!! Thanks!!

**Related Questions**

English expression - How many are there in Mi-na's family? There are five in her...

What animals eat - 1. What does a hippopotamus(hippo) eat 2. What does a koala ...

Math - Each person in Sharae's family of 5 eats 3 bowls of cereal each week. Her...

Health - Is it not good for health to eat soup all the time? Responses Health - ...

English - 1. People in my town eat fish a lot, but we eat only fish heads. 2. ...

Dogs - Do dogs eat rodents, fish, and rabbits? no. dogs do not eat any of those ...

English - I have a few questions on sentences I wrote last week. Could you ...

government - the republican and democratic parties: my answers is b or d. A)are ...

Math - A killer whale has eaten 75 pounds of fish today. It needs to eat at ...

Math - Ben has 4 people in his family. They have 6 cupcakes left to eat. How ...