A survey of 260 families showed that
99 had a dog;
76 had a cat;
34 had a dog and a cat;
98 had neither a cat nor a dog nor a parakeet;
8 had a cat and a dog and a parakeet.
How many had a parakeet only?
Stacey Warren - Expert brainly.com
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Now, Dog+Cat=99+76-34 (by set theory and Venn diagram
now, notice that Dog+Cat+X=260-98.
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(76 - 34) + (99 - 34) + 34 + P = 162
Can you solve for p ?
Do you understand this ?
i got 21
A survey of 86 college students was taken to determine the musical styles they liked. Of those, 36 students listened to rock, 34 to classical, and 37 to jazz. Also, 17 students listened to rock and jazz, 15 to rock and classical, and 16 to classical and jazz. Finally, 6 students listened to all three musical styles. Construct a Venn diagram and determine the cardinality for each region in order to answer the following question.
How many students listened to classical and jazz, but not rock?