exam Maths Puzzle Numerical Ability

Can someone please help me with this.

An urn contains 8 balls indentical in every respect except color. There are 4 blue balls, 3 red balls, and 1 white ball.

a) if you draw

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Please help me solve this equation...thank you.
X+Y=2
6X+Y=2 In a certain company, 30 percent of the men and 20 percent of the women attend night school. If 40 percent of all employees are men, what percentage of all the employees attend night school?