So P of X summation P of X is one sum of probabilities of all the possible values of X has to be equal to one. So मैं कर दिया 1/20 3/20 4/20 पीछे 5/20 okay
So P of X summation P of X is one sum of probabilities of all the possible values of X has to be equal to one. So main kar diya 1/20 3/20 4/20 peeche 5/20 okay