In order to find out the percent in commissions a car salesman received, you need to divide $1953 by $65100. The result is .03, which translates to 3%.
The probability is (1/6)^5 power. Since the locks are independent of each other, you can multiply the probabilities together. There are 6 possible numbers for each lock and there are 5 locks. So the probability is (1/6)^5 power.<span />