Rule: Either provide the exact fraction or decimal of the probability or round off the final result to three significant digits. Example: The probability of rolling a ‘4’ with a single die is ...

\(3.168\) is correct to three decimal places as there are three digits after the decimal point. If the number at the next decimal place is five or more add 1 to the previous decimal place ...

So, \(3.168\) rounds up to \(3.17\) (to two decimal places). Round \(17.839\) to one decimal place. If the number at the next decimal place is smaller than five then leave the previous decimal ...