100 seats total.
there are 25 seats per section and 4 sections
they just add in fancy stuff to make it confusing.
You would multiply the students by the price (12*10=120) then multiply chaperones by price (6*15=90) then add both prices together to get 210. Then you would subtract 210 from 380 to get how many boys are in the class. 380-210=170. Since each student cost 10 so you would divide 170/10=17. There would be 17 boys in your class.
The answer would be 2:5
you first have to add all the cards together to find out how many cards you have total. In this case there are 60 cards. So your first starting number would be 24 : 60 this would need to be simplified by figuring out what is the largest number both numbers can be divided by equally. In this case 12, so your final answer would be a 2 to 5 chance of pulling a blue card. Hope this helps.
The order is C,A,B for this problem
