The total number of students is 8 + 12 = 20.
The probability of choosing a thirteen-year-old student is 12/20 = 3/5.
Therefore, the probability that the representative will be a thirteen-year-old is 3/5.
Answer: 3/5
There are 8 twelve-year-olds and 12 thirteen-year-olds in Mr. Rossi's class. One student will be chosen randomly to represent the class at a conference of seventh-grade students. What is the probability that the representative will be a thirteen-year-old?
2/3
1/2
3/5
2/5
1 answer
1 answer