The ratio of boys and girls in this class is 2.

The event has a probability of 0.1.

There is very little probability that we will win.

There is a strong probability that we will win.

We bet two to one that he would win.

His chances of winning are four to one.

He has a 99% chance of winning the election.

Chances are even that he will be elected governor.

The rate of competition was five to one.

The pass rate was one in ten.

The President’s approval rating is 55%.

It’s 30% chance of rain.