I can't answer this definitively, but broadly for VC firms it's like 1/10 work out well, 2-3/10 you make your money back, and the other 7/10 you lose most of your money. read more
We are looking not at these anecdotal success rates, but at annualized investment returns. Sequoia's worst fund since 1999 / 2000 returned 3% p.a. (IRR), the best one 11% (IRR). read more