The half-hour newscast includes 12 minutes of national news, 5 minutes of international news, 5 minutes of sports, and 2 minutes of weather forecasts. The rest is advertisements. How many minutes of advertising are in the newscast?
12+5+5+2=<<12+5+5+2=24>>24 minutes are accounted for.
There are 30-24=<<30-24=6>>6 minutes of ads.
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