At the movie theater, child admission is $5.30 and adult admission is $9.10. On Tuesday, three times as many adult tickets were sold as child tickets were sold, for total sales of $1956. How many child tickets were sold that day?
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Respuesta :

1956/(3+1)=489 adult tickets cost for all adults
1965-489= 1467 cost of child tickets
1467/5.30=276.8 
277 child tickets were sold.