GMAT Verbal Section | Re: When to use "whether" and "if"

I've found that typically, most people think "if" sounds better, most of the time.

If you're going to make a mistake, you'll accidentally useif where you should use whether . I very rarely see people usewhether where they should use if . For instance, this is the type of mistake I actually see (both on the GMAT and in real life):

"I wonder if she's going to the party?" (wrong - should be 'I wonder whether she's going')

I never see people make mistakes like this one:

"I'm
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