Hi I wrote my program in Rust and get this feedback, what could be wrong?

error[E0061]: this function takes 2 arguments but 1 argument was supplied
--> src/lib.rs:94:31
|
94 | test.push(rng.gen_range(range.0..=range.1));
| ^^^^^^^^^ ----------------- supplied 1 argument
| |
| expected 2 arguments

error: aborting due to previous error

For more information about this error, try rustc --explain E0061.
error: could not compile qualified-rust.

NOTE: Line numbers in error messages can be incorrect due to concatenation.