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Let W=W = Surfers Wearing Wet Suits }\} , With W=6| W | = 6

question 63

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Let W=W = surfers wearing wet suits }\} , with W=6| W | = 6
H=H = surfers with blonde hair }\} , with H=12| H | = 12
B={B = \{ surfers who ride long boards }\} , with B=3| B | = 3
Also, let WH=4,WB=1,HB=2| \boldsymbol { W } \cap \boldsymbol { H } | = \mathbf { 4 } , | \boldsymbol { W } \cap \boldsymbol { B } | = \mathbf { 1 } , | \boldsymbol { H } \cap \boldsymbol { B } | = 2 , and WHB=15| \boldsymbol { W } \cup \boldsymbol { H } \cup \boldsymbol { B } | = 15 .
-How many surfers either wear a wet suit, have blonde hair, or ride a long board?


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