Question 24
Numbers are drawn from the 90 integers 10 through 99. At least how many must be drawn to guarantee two numbers whose sum is 75?
Source glossary (English–Vietnamese): Integer: số nguyên; At least: ít nhất; Random: ngẫu nhiên; Ensure: chắc chắn; Sum: tổng.
Editorial clarification: the numbers are drawn without replacement, so the two selected numbers are distinct.
Source glossary (English–Vietnamese): Integer: số nguyên; At least: ít nhất; Random: ngẫu nhiên; Ensure: chắc chắn; Sum: tổng.
Editorial clarification: the numbers are drawn without replacement, so the two selected numbers are distinct.