In an experiment, refractive index of glass was observed to be \( 1...

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In an experiment, refractive index of glass was observed to be \( 1.45,1.56,1.54,1.44,1.54 \& 1.53 \). Calculate mean value of refractive index.
(1) 1.51
(2) 2.45
(3) 1.52
(4) 1.15
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