In a Poisson Distribution, if ‚Äö√Ñ√∂‚à ö√ë‚à ö‚â§n‚Äö√Ñ√∂‚à ö√ë‚à ö¬• is the number of trials and ‚Äö√Ñ√∂‚à ö√ë‚à ö‚â§p‚Äö√Ñ√∂‚à ö√ë‚à ö¬• is the probability of success, then the mean value is given by

• A. m = np
• B. m = (np)²
• C. m= np(1-p)
• D. m= p