Afthab Begum, M I2017-03-312017-03-312011https://ir.avinuty.ac.in/handle/avu/2442Consider an AY/C/l queue with exponentially distributed multiple and single working vacations where the ser\er cooks at a slower rate rather than completely stops service durinu \acation periods. Using supplementary vtiriable technique, we deme the sie,ul\-state distributions for the number of customers m the system both at the tirbitrar)' epoch and departure epoch. Further the expected system si/e and various probabilities are calculated and the results obtaineil are illustrated numerically.