Question 24
Numbers are drawn from the 80 integers 20 through 99. At least how many must be drawn to guarantee two numbers whose sum is 70?
Source glossary (English–Vietnamese): Drawn: chọn ra; Integers: 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): Drawn: chọn ra; Integers: 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.