A passing train crushed her left leg, forcing doctors to amputate below the knee to save her life.
"At that time everyone was worried for me. I then realized I had to do something in my life so that people would stop looking at me with pity," Sinha told Indian TV before leaving for the climb.
The Tata Steel Adventure Foundation, which sponsored Sinha's climb, contacted Sherpa's Asian Trekking company in 2012 about providing training and guiding for the expedition.
"We knew her story, we knew she recovered well from the amputation because she's a very active athlete," Sherpa said, adding that the company trained her on Nepal's Island Peak during the 2012 spring climbing season.
Hundreds of climbers have thronged the world's highest peak during a window of good weather. May is considered the best time for climbing in the Nepalese Himalayas because of mild weather and some 300 people have reached the 8,848-metre high Everest so far this year.
The mountain has become a popular symbolic pilgrimage site for record-setting, awareness-raising, and pledge drives for charities, which have increased crowds on the peak.