book Maths Puzzle Numerical Ability

expression for value of 3-digit number whose hundreds, tens, and units digits are x,y, and z

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book Other Question

he probability that a bank customer will default on a loan is 0.04 if the economy is good and 0.13 if the economy is not good. Suppose the probability that the economy will be good is 0.65. What is the probability that the person will default on the loan? How many diagonals can be drawn from one vertex of a 12 sided polygon?