1. The survey that would not be valid with a sample of seventh-grade classmates is "best retirement plans." Seventh-grade students are not eligible for retirement plans, so this survey would not apply to them.
2. The probability of choosing a red marble is 3/10 (since there are 3 red marbles out of 10 total marbles).
1. Sonya is thinking of conducting a survey with her seventh-grade classmates. She knows she will need to use a sample of students in her survey. Which of the following surveys would not be valid with a sample of seventh-grade classmates?
best theme for middle school dance
best retirement plans
best shoes for PE
best backpack for school
2. A bag contains 4 white, 3 blue, and 3 red marbles. Find the probability of choosing a red marble.
7/10
7/100
1/20
3/10
1 answer