What proportion of area of a normal curve is included between (i) σ (ii) 2σ (iii) 3σ distances from the mean? 

1
34.13%, 47.72%, 49.87% 
2
60%, 70%, 90% 
3
62.27%, 95.45%, 99.73% 
4
None of these
5
Question Not Attempted

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