You roll a die 15 times, and count the number of times you get a 3or a 4. A) Wha

Question

You roll a die 15 times, and count the number of times you get a 3or a 4. A) What is the probability that you roll a 3 or 4 a total of 9times? B) What is the probability that you roll a 3 or 4 EXACTLY 2times? C) What is the probability that you roll a 3 or 4 NO MORE THAN1 time? Please show how you got the answers, i will rate lifesaver!!Thanks!! A) What is the probability that you roll a 3 or 4 a total of 9times? B) What is the probability that you roll a 3 or 4 EXACTLY 2times? C) What is the probability that you roll a 3 or 4 NO MORE THAN1 time? Please show how you got the answers, i will rate lifesaver!!Thanks!!

Explanation / Answer

P(get a 3 or 4) in each roll = 2/6 = 1/3 Let X be the roll of 3 and 4 X~Binomial (n = 15, p = 0.3333) A) P(X = 9) = 15C9 (0.3333)9(0.6667)6 = 0.0223 B) P(X =2) = 15C2 (0.3333)2(0.6667)13= 0.06 C) P(X

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