Question

1. the math teachers at miller intermediate made an experiment to determine how many delta math lesson students were completing in both the 7th and 8th grade. the results of their experiment are in shown in the table. table: rows are 7th grade, 8th grade; columns are 0-20, 21-30, more than 30; values: 7th grade - 15, 25, 60; 8th grade - 25, 45, 30 based on the results, what is the experimental probability that a student is in the 7th grade and completed more than 30 delta math lessons? type a response

Explanation:

Step1: Calculate the total number of students

Add up all the values in the table:
$$15 + 25+60 + 25+45+30=200$$

Step2: Find the number of 7th - grade students who completed more than 30 lessons

From the table, the number of 7th - grade students who completed more than 30 lessons is \(60\).

Step3: Calculate the experimental probability

The formula for experimental probability \(P=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}\). Here, the number of favorable outcomes (7th - grade students who completed more than 30 lessons) is \(60\), and the total number of outcomes (total number of students) is \(200\). So \(P = \frac{60}{200}=\frac{3}{10}=0.3\)

Answer:

\(0.3\)