Venn Diagrams.

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Presentation transcript:

Venn Diagrams

A survey of 80 sophomores at a certain western college showed the following:   36 take English 32 take history 32 take political science 16 take history and English 16 take political science and history 14 take political science and English 6 take all three

How many students: a) take English and neither of the other two How many students: a) take English and neither of the other two? b) Take none of the three courses? c) take history, but neither of the other two? d) take political science and history but not English? e) do not take political science?

A chicken farmer surveyed his flock with the following results A chicken farmer surveyed his flock with the following results. The farmer has: 9 fat red roosters(male) 37 fat chickens 6 thin red roosters 2 fat red hens 7 thin brown hens 5 thin red hens 26 fat roosters (total) 18 thin brown roosters (HINT: in your Venn diagram make a circle for fat, for male and for red)

Answer the following questions about the flock(HINT: in your Venn diagram make a circle for fat, for male and for red). How many chickens are:   fat? __________ red? ___________ c) male? _________ fat, but not male? _________ e) brown, but not fat? ________ f)   red and fat? _________

Country-Western songs emphasize three basic themes: love, prison and trucks. A survey or the local Country-Western radio station produced the following data:   12 songs about a truck driver who is in love while in prison 2 about people in prison who are not in love and do not drive trucks 8 about people who are out of prison, are not in love, and do not drive a truck 13 about a prisoner in love 28 about a person in love 18 about a truck driver in love 16 about truck drivers who are not in prison 3 about a truck driver in prison who is not in love

Find the number of songs about: How many songs were surveyed? truck drivers? ______ prisoners? __________ d) truck drivers in prison? ______ people not in prison? __________ f) people not in love? ______

In a certain hospital, the following data on patients were recorded:   25 patients had the A antigen 30 had the Rh antigen 17 had the A and the B antigen 12 had none of the antigens 27 had the B antigen 16 had the A and Rh antigen 22 had the B and Rh antigens 15 had all three antigens

How many patients:   a) are represented here? _________ b) have exactly one antigen? __________ c) have exactly two antigens? ________