OpenStax, Algebra and Trigonometry 2e §13.7 Probability · Exercise 135 · Probability · Counting & chance
Probability · Exercise 135
In a competition of 50 professional ballroom dancers, 22 compete in the fox-trot competition, 18 compete in the tango competition, and 6 compete in both the fox-trot and tango competitions. How many dancers compete in the fox-trot or tango competitions?
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OpenStax, Algebra and Trigonometry 2e · §13.7 Probability · Exercise 135
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