Posted by **Danielle** on Tuesday, October 25, 2011 at 8:15am.

Seven standard, six-sided dice are rolled, one after the other. What is the probability that:

a) exactly one of them shows a six?

c) there is at least one that shows a six?

- Math -
**Reiny**, Tuesday, October 25, 2011 at 8:47am
prob(6) = 1/6

prob(not6) = 5/6

a) exactly 1 out of 7 tries to be 6

= C(7,1) * (1/6)^1 * (5/6)^6

= .3907 rounded to 4 decimals

b) at least one 6 ---> 1 - prob(all not6)

= 1 - C(7,7) * (1/6)^0 * (5/6)^7

= 1 - .2791

= .7209

## Answer this Question

## Related Questions

- Geometry - Six standard six-sided die are rolled. Let p be the probability that ...
- math - A six sided die is rolled three times. List possible outcomes and find ...
- Alg2/trig - Hi, I hope you guys don't mind if I post a couple probability ...
- math - If four standard six-sided dice are rolled,what is the probability that ...
- math - A specially made pair of dice has only one- and two-spots on the faces. ...
- Probability - When two fair six-sided dice are rolled, there are 36 possible ...
- Data management - Which of the following three events is more likely to happen ...
- Math - Which pair has equally likely outcomes? List the letters of the two ...
- math - A six-sided die (with numbers 1 through 6) and an eight-sided die (with ...
- math - anderson will roll two standard six sided dice once. what is the ...

More Related Questions