The random variable X has a variance of 2.4

Let Y = 5X + 7.6

What is the standard deviation of Y?

Please show me how to work out

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- April 27th 2010, 02:57 AMartikillerI can't work out the SD of this question
The random variable X has a variance of 2.4

Let Y = 5X + 7.6

What is the standard deviation of Y?

Please show me how to work out - April 27th 2010, 03:58 AMmr fantastic