Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

In four throws with a pair of dice, what is the chance of throwing doubles at least twice?

share|improve this question

closed as off-topic by Thursday, Daniel Fischer, RecklessReckoner, Hakim, le gâteau au fromage Jul 20 at 0:08

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Thursday, Daniel Fischer, RecklessReckoner, Hakim, le gâteau au fromage
If this question can be reworded to fit the rules in the help center, please edit the question.

6  
Do you have any thoughts? Do you know what the chance of throwing doubles in one throw is? On two successive throws? –  Ross Millikan Apr 26 '11 at 18:38
    
Yes,i do.I got stuck in this prob and so i asked. –  user10095 Apr 26 '11 at 21:14
1  
I haven't down-voted this question (yet...), but would suspect that others have because you just asked a question without showing any effort whatsoever. –  The Chaz 2.0 Apr 26 '11 at 21:54

2 Answers 2

Hint: First, calculate the probability of getting doubles in one throw (What is the number of incidents?), then at least once in four throws (again, count the good incidents and divide by total) and at the end you will get your answer.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.