\(x=(17+16\%of200)−(3\%of300)\)
\(16\%of200=32\)
\(32+17=49\)
\(3\%of300=9\)
\(49-9=40\)
\(\therefore x=40\)
The correct answer is (D): 40
A box contains 16 red, 12 white, and 15 yellow identical marbles. A man picks one marble at a time without replacement. How many times must he pick a marble to be 100% certain of picking at least 3 white marbles?