First, let's calculate the total number of students in each grade:
7th grade: 8 (from Homeroom A) + 10 (from Homeroom B) + 7 (from Homeroom C) = 25 students
8th grade: 9 (from Homeroom A) + 10 (from Homeroom B) + 9 (from Homeroom C) = 28 students
Total number of students: 25 (7th grade) + 28 (8th grade) = 53 students
Now, let's calculate the number of students in Homeroom B:
Homeroom B: 10 (7th graders) + 10 (8th graders) = 20 students
Probability that the winner is NOT in Homeroom B:
= (Total number of students - Number of students in Homeroom B) / Total number of students
= (53 - 20) / 53
= 33 / 53
≈ 0.62
Therefore, the probability that the winner is NOT in Homeroom B is approximately 0.62.
Students in the 7th and 8th grade at Imawinner Middle School are going on a field trip to the planetarium. If a student actively participates in the engagement activities at the planetarium, they are entered into a raffle to win a free lunch from their favorite restaurant. The table below shows the number of students in each grade and homeroom who engaged in the activities. Table" Homeroom A has 8 7th graders and 9 8th graders Homeroom B has 10 7th graders 10 8th graders Homeroom c has 7 7th graders
9 8th graders
What is the probability the winner is NOT in Homeroom B?
1 answer