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CT1 September 2010 Q7iic

M

mary_t

Member
Hello,
I'm having some trouble with the solution to this question.

In the solution, the second Redington's condition to be met states the following:

3Xv^3 + 12Yv^12 = 419.922

Can someone please advise me where the 419.922 has come from?
I can't seem to come up with the correct calculation.

Thank you in advance
 
Here, 41.9922 is multiplied by 10 because it's just the numerator.
 
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