Current location - Training Enrollment Network - Mathematics courses - The average score of 5 1 class in a primary school is 90, with a total score of A95B. How many students are there in this class?
The average score of 5 1 class in a primary school is 90, with a total score of A95B. How many students are there in this class?
A95B is divisible by 90.

∴B=0

∵A95B can be divisible by 90, and ∴ can also be divisible by 9.

∴A+9+5 is divisible by 9.

∴A=4

The total score is 4950

4950÷90

=55

There are 55 students in this class.