exam Maths Puzzle Numerical Ability

If you mix 140mL of a 60% acid solution with 200 mL of a 30% solution you get a 40 mL of a _______% solution.

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exam Other Question

A firm decides to test its employees for illegal drugs. (a) State the null and alternative hypotheses.
(b) Define Type I and II error. (c) What are the consequences of each? Which Please help I am STUCK!!

a^3x(c^2m)^x*a^x/2

DIVIDED BY

c^mx/3