Question 384105
Find the z score,
{{{z=(x-mu)/sigma}}}
{{{z=(x-mu)/sqrt(VAR)}}}
{{{z=(70-79)/sqrt(144)=-9/12=-0.75}}}
Now find {{{P(x<70)=P(z=-0.75)}}}
That's your solution.
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Find two z scores,
{{{z[1]=(64-79)/sqrt(144)}}}
{{{z[2]=(96-79)/sqrt(144)}}}
and
{{{P(64< x <96)=P(z[2])-P(z[1])}}}