Each of the integers from 0 to 9, inclusive, is written on a separate slip of blank paper and the ...
Each of the integers from 0 to 9, inclusive, is written on a separate slip of blank paper and the ten slips are dropped into hat. If the slips are then drawn one at a time without replacement, how many must be drawn to ensure that the numbers on two of the slips drawn will have a sum of 9?
Answer/Solution
5
Steps/Work
i'm not sure i got the question right, if it is what i think it is, then 5 should be the right answer
0,1,2,3,4,will not have 2 slip sum of 9, add another (either 6,7,8 or 9) and we'll have a pair with sum 9
Ans:C
0,1,2,3,4,will not have 2 slip sum of 9, add another (either 6,7,8 or 9) and we'll have a pair with sum 9
Ans:C