Experts say that 25% of all serious bike accidents involve head injuries and that of all head injuries, 80% are fatal. What percent of of all serious bicycle accidents involve fatal head injuries?
x = bike accidents
.25 x = bike accidents with serious head bonks
80 % 0f these are fatal
.80 * .25 x = fatal bike accidents
.20 x = fatal bike accidents
20 % of bike accidents are fatal Don't be stupid .....or dead....wear your brain bucket !!!!!