exam
Maths Puzzle
Numerical Ability
There are 5 nickels, 3 dimes, and 2 quarters. What is the probability of selecting 1 nickel, 1 dime, and 1 quarter in any order with replacement?
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exam Other Question
A liter of fluid is 50% alcohol. How much water must be added to dilute it to a 20% solution?
my work: so x is the amount of water to be added.
so something + x should = .20??
5x-4y=1
3x-6y=6