Some of Mixture Probability Distributions and its Properties

Mixture models play a vital role in many practical applications. For example direct applications of finite mixture models are in fisheries research economics medicine psychology botany agriculture zoology life testing reliability and among others. So we attempt in this work to contribute to shed light on this topic. By means of discussing a mixture of some distributions with Weibull distribution like Exponential Pareto and Erlang named as ?-distribution and mix ?-distribution with Exponential distribution (M?DED)with discussion some of their properties.