If 300 of 100,000 residents signed the petition against the two children's books, what is the probability that a resident chosen at random signed the petition?

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The number of residents signed the petition against the two children's books is 300. There are total 100000 residents.

The probability that resident chosen signed the petition = (umber of residents signed petition) / Total number of residents

= 300 / 100000

= 0.003

The probability that resident is signed petition is 0.003