exam Maths Puzzle Numerical Ability

Could someone help me answer this probabilities and statistics question?
How many paths can a rook move from the lower left corner of a chessboard to the diagonally opposite corne

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exam Other Question

A person invested $10,000. The greater part is invested at 6% and the remainder at 5%. The annual income from the greater part is $160.00 more thatn the annul income from the smaller part. What is the smaller part of the investment? Identify the center and radius of the circle x^2+y^2-2x+4y-6=0