1. 75. In a group of 100 blood donors, typically 9/25 have type A Rh-positive blood and 3/50 have type A Rh-negative blood. What fraction have type A blood?
2. Find the difference in length of two scarves if one scarf is 5/12 of a yard long and the other is 2 /3 of a yard long.

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of a yard of a yard