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Question

Joanne baked some buns. Of the buns she baked, 60% were raisins buns and the rest are cranberry buns. After she baked another 40 raisins and 40 cranberry buns, 45% of the buns were cranberry’s. Find the total number of buns she baked at first.

Answer

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raisin buns : cranberry buns : total
6 units : 4 units : 10 units
45% = 9/20 ——- 4 units + 40
55% = 11/20 ——- 6 units + 40
11 x (4 units + 40) = 44 units + 440 = 9 x (6 units + 40) = 54 units + 360
1 unit = (440 – 360)/(54 – 44) = 8
10 units = 80

Ans : 80 buns.

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