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6. A certain typing agency employs 3 typists. The average number of errors per article is 2.2 when typed by the first typist,

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PREBER coastre, plX=0)=2x2ce Let Ei Event that there will be Perror. P(EJA): @22 P (ELB) = @ 207 PEC): 73.1 also P(A) = P(B):

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