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A set of marks (x), with mean 35 and standard deviation 5, is converted to a new set of marks (y), with mean 50 and standard deviation 15, using a transformation of the form y = a + bx. What new mark corresponds to the original mark of 40?

(a) 55
(b) 60
(c) 65
(d) 953

choose an answer.
Guest Feb 3, 2012
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60?

Guest Nov 3, 2015

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