The following table gives blockwise to lovsl number of rural enterprises in three Enterprises Blocks blocks, say, A, B and C of a particular district of Assam. Trading Service A B C Total 91 120 166 377 62 107 112 281 Restaurants Total 30 28 34 92 183 255 312 750 Select a sample of 150 enterprises by stratified random sampling technique on the basis of proportional allocation to carry out a research investigation in respect of the performance of the enterprises.