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Fans can expect to pay an average ofR$187.29 a ticket. Cheap Rock In Rio tickets start atR$164.00 for a GA ticket to the festival. Premium VIP Rock In Rio tickets cost as much asR$229.00 a ticket.

Rock in Rio will have a media budget of about $30 million, counting expenditures by both the festival and its partners.

In a 2-by-2 table with cells a, b, c, and d (see figure), the odds ratio is odds of the event in the exposure group (a/b) divided by the odds of the event in the control or non-exposure group (c/d). Thus the odds ratio is (a/b) / (c/d) which simplifies to ad/bc.

Calculating probabilities is expressed as a percent and follows the formula: Probability = Favorable cases / possible cases x 100.