Hi Candidate,

If you have found a mistake in se printed text , that might be due to following reasons:

• It might be a printing mistake, you can compare it on other same book.
• It might be a slight mistake by the solution provider.
• Or the question might be different.

What you can do?

• Check for the solution in the internet.
• Check the explanation of the solution, of it matches as it provided in the book
• If found a real error, you can  mark the right answer on your own for future reference.
• You can notify the book publisher, by sending them an email with all proofs of the solution. You can get the email printed at backside of the book or at index page.

Sometimes, publishers run such programs to find mistakes and the first reporter of the mistake gets the reward. You should not loose the opportunity.

Thank you!