The Global Bell Curve has 380 pages.
The Bell Jar has 288 pages.
The Bell Curve Debate - book - has 720 pages.
Ahead of the Curve has 283 pages.
The Midnight Bell has 200 pages.
The Global Trap has 351 pages.
There is no answer to this question. The greater the number of rolls, the closer you get to the bell-curve. But you will never ever actually reach the bell-curve.
The Bell at Sealey Head has 288 pages.
In Defense of Global Capitalism has 277 pages.
The Discovery of Global Warming has 240 pages.
The Real Global Warming Disaster has 368 pages.
Nonkilling Global Political Science has 267 pages.
There are infinitely many bell curves and you need to have the distribution parameters to find percentages.