exam
Maths Puzzle
Numerical Ability
A chemist wants to mix a 60% saline solution with 20 liters of a 45% saline solution to obtain a 55% saline solution. How much of the 60% solution should she use?
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exam Other Question
Find the value for the correlation coefficient r
x 5, 1, 4, 2, 3
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y 5, 10, 12, 4, 8
Can anyone help?
Two numbers a and b, are randomly selected without replacement from the set {2,3,4,5,6,7}. What is the probability that the fraction a/b is lessthan 1 and can be expressed as a terminating decimal?
Could you please explain this, Please?