To win $1 million, you must draw two cards whose sum is nine, from a stack of cards numbered 1 through 10. After the first draw, you replace the card and shuffle the stack again for the second draw. What is the chance your two cards will have a sum of nine?

Question

To win $1 million, you must draw two cards whose sum is nine, from a stack of cards numbered 1 through 10.  After the first draw, you replace the card and shuffle the stack again for the second draw.  What is the chance your two cards will have a sum of nine?

Reiny · Answer

What you need is 18, 27, 36, 45, 54,63,72,and 81 there are 8 of those Prob = 8/100 = 2/25 Let me at this game please.