Maria's grandparents were celebrating their 50th anniversary. Each of the children contributed $100 and the grandchildren each contributed $80. Together, all 15 members the family collected a total of $1,300 dollars for the celebration. How many children did Maria's grandparents have.	Pick:
A) 3	B) 5	C) 8	D) 9	E) 10
Let x = the number of children. That means the number of grandchildren = 15 - x.   The amount contributed by the children = 100x. The amount contributed by the grandchildren = 80(15 - x).   This means: 100x + 80(15 - x) = 1300   100x + 1200 - 80x = 1300   100x - 80x = 1300 - 1200   20x = 100   x = 5   Answer: 5
<result>B</result>
Maria's grandparents were celebrating their 50th anniversary. Each of the children contributed $100 and the grandchildren each contributed $80. Together, all 15 members the family collected a total of $1,300 dollars for the celebration. How many children did Maria's grandparents have.