What if my implicit wait is 10 secs and explicit wait is 5 secs, will it wait for 15 seconds in expected conditions

10 seconds ImplicitlyWait for a element is not a valid statement. Explicit Wait of 5 second you have to put for a certain state/behavior of the element (e.g. element_to_be_clickable). If the element doesn’t shows that behavior within the defined time slot Selenium will throw an exception.