If the mean and variance of the following data : 6, 10, 7, 13, a, 12, b, 12 are 9 and $${{37} \over 4}$$ respectively, then (a $$-$$ b)2 is equal to :
JEE · Math · previous-year question
- A.24
- B.12
- C.32
- D.16
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