When calculating probability, we are comparing the number of favorable outcomes to the number of possible outcomes. To calculate the probability that a randomly chosen letter tile is M, we will use the Probability Formula.
P=Favorable Outcomes/Possible OutcomesIn the word MISSISSIPPI, there are 1 M, 4 I, 4 S and 2 P letter tiles. The sum of these values is the number of possible outcomes.
1+4+4+2= 11 letter tiles
Out of these, only 1 tile is M, which is the number of favorable outcomes. Now we have enough information to calculate P(M).