(4 points) In a survey of families, the following data were obtained relating to the number of pets in their household: Number of Pets Frequency 0 10 1 15 2 10 3 10 4 5 Total 50 What is the probability of calling a random family from the list that has less than 3 pets? What is the probability of calling a random family from the list that has less than 3 pets?