book Maths Puzzle Numerical Ability

no matter what i dont i just cant figure out this problem.please help me.


Man and Train on a Bridge A man is walking across a railroad bridge that goes from point A to point B

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book Other Question
Simplify the exponential expression.

(-6x^2Y^4Z^9)^2/(3X^6Y^4Z^3)^2 a bag contains 5 blue, 6 green, and 2 yellow. if two are picked at random what is the probability that one green and one yellow will be picked.