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Facebooked social media online platform claims that 65% of the companies who advertise using their online platform have growth in sales revenue within 1 week

Facebooked" social media online platform claims that 65% of the companies who advertise using their online platform have growth in sales revenue within 1 week of the first appearance of the advertisement. what is the probability the among 80 randomly selected companies who advertise on "facebooked" at most 47 of them have growth in sales revenue within 1 week of the first appearance of the advertisement?

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