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Venn Diagram Word Problem

Q:  Superburger sells hamburgers with the choice of ketchup, mustard and relish. One day they sold 256 hamburgers; 140 had mustard, 140 had ketchup, 84 had ketchup and relish, 62 had mustard but no relish, 68 had ketchup and mustard, 38 had all three condiments and 20 had none.

(a) The number sold with relish only is?

(b)The number sold with no relish is?

A:  This problem would be best solved with a Venn Diagram.  You should be drawing it yourself as you read along…

Draw 3 circles that all over-lap:

Circle K:  Burgers with Ketchup

Circle R:  Burgers with Relish

Circle M:  Burgers with Mustard

Like so:

venn1

Now, we always want to fill Venn Diagrams with the most complicated information first.

38 had all three condiments.  Put that number in like so:

venn1

Now fill in these pieces (I am going out of order on purpose to make sure we get it right):

84 had ketchup and relish; 68 had ketchup and mustard; 20 had none.

Note:  84 had ketchup and relish.  The total number in the section that overlaps K and R should be 84.  38 is already in that circle, so 84 – 38 = 46 should be in the remaining piece.

68 had ketchup and mustard… The K and M overlap should total to 68… So, 68 – 38 = 30 should go in the remaining.  Look:

The 20 goes on the outside because it represents the burgers with nothing.

venn1

Now let’s add these pieces of info:

140 had ketchup; 62 had mustard but no relish.

The K circle should total up to 140… So 140 – 30 – 38 – 46 = 26 is the number that should go in the remaining K spot.

62 should be the total in the M but no R section…  There is already 30 in that section, so 62 – 30 = 32 should go in the M but no R section… Look:

venn1

Now, use this piece of info:

140 had mustard

In the remaining Mustard slot should go 140 – 32 – 38 – 30 = 40.

venn1

Now, for the final space…. We know there are 256 total hamburgers… So, we need to take 256 subtract all of the numbers to see how may are left for that last space….

256 – 20 – 40 – 46 – 38 – 30 – 32 – 26 = 24

Fill it in!  Almost done:

venn1

The Venn Diagram is complete.  Now we can answer the questions:

(a) The number sold with relish only is?

The number that is in the R circle but no other circle:  24.

(b)The number sold with no relish is?

Every number not in the R circle:  20 + 32 + 30 + 26 = 108.

15 thoughts on “Venn Diagram Word Problem

  1. good question and good explanation

    pls post some more qstion and answer

    thankyou

  2. good question and a good examples

  3. thanks…………….

  4. wow.. it really heLps me a lot .. !! i got a perfect score in math quiz out of 60 . my classmates and my teacher got surprised because i always got low score in quizzzes in mathematics. thanks a lot!

  5. love it .. really helps me a lot .. thanks to the person who post this. 🙂 thank for sharing your knowledge in mathematics. hope that all people will read your post so that they can learn what people who read this ,including me , learned . 🙂 lovelots ,, 🙂 . hope that i can share it to my fiends , soon 🙂 😛

  6. Nice a lot it really gives knowledge for those who want to know the venn diagram and its application.with very thanks.

  7. Thank you for this, really appreciate it. 🙂

  8. Thanks

  9. Awesome question! I teach 5th grade math in Texas and I am modifying this for use in my classroom! Post more!!!!

  10. thanks for the info really helps me a lot

  11. thank you so much. I had to study for a test and this really helped me 🙂

  12. thanks! it can help me on my exam tomorrow..

  13. thanks!!! this was a big help

  14. Thanks very nice explanation

  15. Thanks, very nice explanation

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