Question

Jill is in Math Club. There are 20 students in the club. The sponsor will pick two students at random to run the meeting. What is the Probability that Jill will not be picked? Give answer as a decimal.

Answer 1

In total there are 20 students and 2 students will be picked.

So far, you have $\frac{2}{20}$.

You can simplify that to $\frac{1}{10}$.

To turn that into a decimal, divide 1÷10. You will get 0.1 

Answer 2

Jill is one of the 18 students out of 20 students in the club that will not be picked.

18/20 = 0.9

The probability that Jill will not be picked is a 0.9 chance (90%).<span />