exam Maths Puzzle Numerical Ability

A bag contains 6 red marbles, 9 blue marbles, and 5 green marbles. You withdraw one marble, replace it, and then withdraw another marble. What is the probability that you do NOT pick two green marble?

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exam Other Question

the measure of angle b, the complement of angle a is 1/6th the measure of angle c, the supplement of angle a Find the measure of each angle I have a problem solving this problem Can someone help me?
The problem is solve using the sqrt property:
2x^2-35=15