Finding the odds against a four of a kind, three of a kind and a straight please

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Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points