Question

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90 balls
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%

Answer 1

10 % = 9 balls

20 % = 18 balls

30 % = 27 balls

40 % = 36 balls

50 % = 45 balls

60 % = 54 balls

70 % = 63 balls

80 % = 72 balls

90 % = 81 balls

100 % = 90 balls

Hope that helps!