Statistics · JEE Main previous year questions

2016 1 question

1. Q152016 · 3 Apr 2016 · Shift 1

   If the standard deviation of the numbers 2, 3, a and 11 is 3.5, then which of the following is true?

   1. A.$3a^2-26a+55=0$
   2. B.$3a^2-32a+84=0$
   3. C.$3a^2-34a+91=0$
   4. D.$3a^2-23a+44=0$
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   Answer: B