# Probability with Dice

• October 22nd 2009, 07:42 PM
Sakurazaki
Probability with Dice
A fair die is thrown 14 times. What is the probability of getting point 1 on exactly 2 of the 14 throws?

Would someone try to give me hints or walk me through it?

Thanks.
• October 22nd 2009, 09:18 PM
tonio
Quote:

Originally Posted by Sakurazaki
A fair die is thrown 14 times. What is the probability of getting point 1 on exactly 2 of the 14 throws?

Would someone try to give me hints or walk me through it?

Thanks.

Read, or google, about "Bernoulli formula" in "binomial distribution": the probability is given by $\left(\begin{array}{c}14\\2 \end{array}\right) \left(\frac{1}{6}\right)^2 \left(\frac{5}{6}\right)^{12}$

Tonio
• October 23rd 2009, 03:52 AM
mr fantastic
Quote:

Originally Posted by Sakurazaki
A fair die is thrown 14 times. What is the probability of getting point 1 on exactly 2 of the 14 throws?