l Example Class 34 Q6 Cathy will read either one chapter of

l. (Example Class 3&4, Q6) Cathy will read either one chapter of her probability book or one chapter of her fairy book. If the number of misprints in a chapter of her probability book is Poisson distributed with mean 2 and if the number of misprints in her fairy chapter is Poisson distributed with mean 5, then assuming Cathy is twice likely to choose a fairy book rather than a probability one, what is the expected number of misprints that Cathy will come across?

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