exam
Maths Puzzle
Numerical Ability
from a group of 8 boys two students are selected to shake hands. how many hand shakes are possible?
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exam Other Question
How many ounces of a 20% alcohol solution must be mixed with 5 ounces of a 50% alcohol solution to get a mixture that is 30% alcohol?
I have my first equation set up as 20% + 50% =30%
I then get confused and need help please.
Evaluate each expression for the given values of the variables.
5k(6-6m) for k=2and m=1/2