7. Find the value of the variable

 
Determine the value of "\(a\)" if the mean of the following data is 15.
 
Class interval \(5 - 10\) \(10 - 15\) \(15 - 20\) \(20 - 25\) \(25 - 30\) \(30 - 35\)
Frequency 8 9 4 \(a\) 2 1
 
The value of the variable is
.
Answer variants:
4
2
6
3
Login or Fast registration
Previous task
Exit to the topic
Next task
Copyright © 2026 YaClass Tech Private Limited Contacts Terms and Conditions Privacy Policy