Sagot :
If X represents the number of heads that will result from the 3 tosses, X can be 0, 1, 2, or 3 based on the above outcome (that is, 0 heads can result, 1 head can result, 2 head can result or 3 head can result). The sum of all probabilities in a probability distribution should be 1, which is true in our case
Step-by-step explanation: