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Cards in a Hat! (Don't you love these?)?
No homework help here...just curious as to what range of answers I'll get.
There are three cards in a hat. One is red on both sides, one is white on both sides, and one is red on one side and white on the other side. You close your eyes, pull a card from the hat, and set it on the table. The side facing up is red. What is the probability that the other side is also red?
(No...it is not 1/2.)
2 Answers
- M3Lv 71 decade agoFavorite Answer
P[draw "double red" card & upper side red] = 1/3 * 1 = 1/3
P[draw "single red" card & upper side is red] = 1/3 * 1/2 = 1/6
P[upper side red] = 1/3 + 1/6 = 1/2
P[other side red] = [1/3] / [ 1/2] = 2/3 <--------
- Anonymous5 years ago
A santa hat is larger than reindeer antlers! Why no longer go out and get your guy or woman santa hat - there are some humorous ones with words on - "naughty" etc. oh, and that i made my teenagers dress up final 3 hundred and sixty 5 days - my eldest daughter advance right into a eye-catching elf - my eldest son santa, my youthful son slightly elf and my toddler a tiny santa - they love those pictures extra suitable than any of our different christmas pictures - so humor your mum - us mums love you too lots and decide to work out you cute and dressed up... pleeeese
