if →a=3^i−5^j,→b=6^i+3^j and →c=→a×→b then ∣∣→a∣∣:∣∣∣→b∣∣∣:∣∣→c∣∣
Weekly wages(in Rs.)0−100100−200200−300300−400400−500Number of workers4039343045
What is the number of people whose wage is less than Rs.400?