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# Need help with Venn Diagrams please watch

1. hi ive been asked a question where i had to find the number of magazines on all 3 topics. this is 3 circles and its the very middle region. ive worked this out. the number of magazines in the universal set that are not on any of the 3 topics is 17 and the next question is..

Now suppose it is unknown how many magazines do not contain artciles on any of the 3 topics (as opposed to the specified number of 17 above). Determine how large this could be and how small this could be given all the other information.

i have attached the venn diagram for this question.

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2. (Original post by sarah_vickers)
hi ive been asked a question where i had to find the number of magazines on all 3 topics. this is 3 circles and its the very middle region. ive worked this out. the number of magazines in the universal set that are not on any of the 3 topics is 17 and the next question is..

Now suppose it is unknown how many magazines do not contain artciles on any of the 3 topics (as opposed to the specified number of 17 above). Determine how large this could be and how small this could be given all the other information.

i have attached the venn diagram for this question.

You need to post the original question. It's impossible to help with the information you have given.

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