Final answer:
To determine how many people play the saxophone, you need to calculate the fraction of the class that plays saxophone. The correct answer is A) 3.
Step-by-step explanation:
To determine how many people play the saxophone, we need to find out what fraction of the class plays the saxophone. We are told that 2/5 of the people in the class are in the band, and 1/10 of the class plays the saxophone. Let's calculate:
Number of people in the band: 2/5 * 30 = 12
Number of people playing the saxophone: 1/10 * 12 = 1.2
Since we can't have a fraction of a person, we round down to the nearest whole number, which is 1.
Therefore, the correct answer is A) 3.