Answer :
The number of students in the 9th grade is 250.
How to calculate the value?
Based on the information, the percentage of those who brought their good from home will be:
= 100 - 24%
= 76%
Therefore, 76% of x = 190
0.76x = 190
x = 190/0.76
x = 250
Therefore, the number of students in the 9th grade is 250.
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