Mean of 100 observations is 50 and S.D. ...

Mean of 100 observations is 50 and S.D. is 10. If 5 subtracted from each observation and then it is divided by 4, then the new mean and S.D. are

11.25, 6.25

11.25, 2.5

11.25, 10

11.35, 3.5

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