This one is from Kaplan
It is not difficult question but I am looking for ideas how to gamble correctly, if you dont have time to do the calculation , what will be the best way to approach it in order to answer it.
The 84 workers at certain plan are either skilled or semi-skilled
semi skilled workers earn 12,000$ per year
skilled worker earn 18,000$ per year
each of the worker is given productivity bonus of 3% of the annual salary
the total amount of the bonus that was awarder is 32,760$
what precent of the worker in the plan are skilled