तेंदुलकर समिति की कार्यप्रणाली के अनुसार, वर्ष 2011-12 में भारत की कितने प्रतिशत जनसंख्या गरीबी रेखा से नीचे (BPL) जीवन यापन कर रही थी?

The _________ is calculated by averaging the square of the poverty gap ratio.

Which expert committee's recommendations, submitted in 2009, led to the revision of the poverty line calculation methodology in India by shifting from a calorie-intake basis to a broader basket of consumption goods?