A clay sample contarning 15% moisutume was mined in a lange miner with 8 weight \% of fracer Particle, After 5 minules of mixing, 5 random sample were taken from the mined porduct and analyzed for tracer concentration. The measured Concentrations in the sample were in weight %. for tracer 7.9,10.4,11.9,9.7,10.9 calculate the mining index (wils nespect to before minung)