It's correct (though questionable*), but it's not an idiom.
*I'm not a fan of using 'manipulate' to refer to operations that don't involve the hands (manus). But it is often used that way - meaning, here, 'to cause to change by artificial means'. 'The odds' here mean 'the likelihoods of various results, and the numbers associated with those likelihoods'.
b
*I'm not a fan of using 'manipulate' to refer to operations that don't involve the hands (manus). But it is often used that way
I shudder to think what that would imply if their hands were involved. :lol:What about manipulative people?