Passage: In 2006, running on a clean-government platform, Palin defeated incumbent Governor Frank Murkowski in the Republican gubernatorial primary. Her running mate was Sean Parnell.In the November election Palin was outspent but victorious, defeating former Democratic governor Tony Knowles by a margin of 48.3% to 41.0%. She became Alaska's first female governor and, at the age of 42, the youngest governor in Alaskan history, the state's first governor to have been born after Alaska achieved U.S. statehood, and the first not to be inaugurated in Juneau (she chose to have the ceremony held in Fairbanks instead). She took office on December 4, 2006, and for most of her term was very popular with Alaska voters. Polls taken in 2007 showed her with 93% and 89% popularity among all voters, which led some media outlets to call her "the most popular governor in America." A poll taken in late September 2008 after Palin was named to the national Republican ticket showed her popularity in Alaska at 68%. A poll taken in May 2009 showed Palin's popularity among Alaskans was at 54% positive and 41.6% negative.Palin declared that top priorities of her administration would be resource development, education and workforce development, public health and safety, and transportation and infrastructure development. She had championed ethics reform throughout her election campaign. Her first legislative action after taking office was to push for a bipartisan ethics reform bill. She signed the resulting legislation in July 2007, calling it a "first step" and declaring that she remained determined to clean up Alaska politics.Palin frequently broke with the Alaskan Republican establishment. For example, she endorsed Parnell's bid to unseat the state's longtime at-large U.S. Representative, Don Young, and she publicly challenged then-U.S. Senator Ted Stevens to come clean about the federal investigation into his financial dealings. Shortly before his July 2008 indictment, she held a joint news conference with Stevens, described by The...

Question: How old was she when she became governor?
42