<p>The masses of bars of chocolate are normally distributed with mean $\mu $ kg and standard deviation $\sigma $ kg. It is known that $20\%$ of the bars of chocolate have masses which differ from $\mu $ kg by at most $m$ kg. Find the probability that a randomly chosen bar of chocolate has a mass which exceeds $\mu $ kg by at least $3m$ kg.</p>

The masses of bars of chocolate are normally distributed with mean $\mu $ kg and standard deviation $\sigma $ kg. It is known that $20\%$ of the bars of chocolate have masses which differ from $\mu $ kg by at most $m$ kg. Find the probability that a randomly chosen bar of chocolate has a mass which exceeds $\mu $ kg by at least $3m$ kg.

Normal Distribution - General

Normal Distribution

H2 Math

International Baccalaureate Higher Level Mathematics

SAJC Normal Distribution Tutorial Set 2

SAJC Normal Distribution Tutorial Set 2

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