The success rate depends on the route chosen and the number of days it will take to climb. Shorter routes like the 5 days Marangu route report a low success rate of about 50% while longer routes of 7-9 days report a considerably higher success rate of 85-90%. The longer the route, the more ample time you get for acclimatization and the higher the success rate.
Get more route comparison and summit success rate stats here
