Number System
The difference between 45% of a number and 18% of the same number is 145.8. What is 30% of that number ?

162
141
245
188

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Number System
A basket contains eight white and ten black balls. Two draws of one ball each are made without replacement. What is the probability that one ball is white and the other ball is black ?

80/150
80/151
80/152
80/153

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