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The Kelley School is having its annual Holiday Fair. Items are sold for either 25 cents or 50 cents. Each child in our class can spend $2.00 at the fair. Assuming that every child spends all of her/his money, how many 25-cent and 50-cent gifts could have been bought altogether by our class of 11 students? Note: All gifts are purchased with either quarters or 50-cent pieces!​