Statistics and Probability Answers

chances of solving a probability problem indepednently by four students a,b,c,d are 1/2,1/4,1/6 and 1/8.if all of them try to solve the problem .what is the probability that the problem will be solved by at least by one of them

there are six entrance to a building. Find the probability that two men, entering at random and at different times, will choose the same door

How many 7 digit numbers greater than 5,000,000 can be generated using the digits {3,4,5,5,6,6,6} if each of the seven digits must be used?

I can not understand his problem.Please someone help me UNDERSTAND HOW TO WORK THE PROBLEM and not just give an answer. ( i already know the answer just dont know how to get it)

The probability of Mr.John solving a problem is 3/4.The probability of Mr.Steave solving is 1/4.What is the probability that a given problem will be solved?

Total population size is 1052 objects. Group A contains 167 objects and Group B contains 885 objects. If objects are randomly drawn without replacement, how many objects must be drawn to obtain a probability of 90% that at least one of the objects belongs to Group A?

the probability that a man will be alive in 25 years is 3/5 and probability for his wife in 25 year is 2/3. find probability that
a) both will be alive in 25 years
b) only the wife will be alive in 25 years

a problem is given to three students a b and c whose chances of solving the problem is 1/3 , 1/4 and 1/5 repesctively. find the probability that the problem will be solved by at least one of them

Consider a game with two players, Mary and Jerry. Mary has a red die and Jerry has a white die. They roll their dice and note the number on the upper face. Mary wins if her score is higher than Jerry's (note that Jerry winds if the scores are the same). If both players roll their dice once each what is the probability that Mary will win the game?

Consider a game with two players, Mary and Jerry. Mary has a red die and Jerry has a white die. They roll their dice and note the number on the upper face. Mary wins if her score is higher than Jerry's (note that Jerry winds if the scores are the same). If both players roll their dice once each what is the probability that Mary will win the game?

What are the variables in this task? Why?

Now consider the same game where Mary can roll her die a second time and will note the higher score of the two rolls but Jerry rolls only once. In this case what is the probability that Mary will win?

Investigate the game when both players can roll their dice twice, and also when both players can roll their dice more than twice, but not necessarily the same number of times.

Generalize your findings to generate a formula for Mary winning and a formula for Jerry winning.

Verify and justify how your rule works.

what degree of accuracy you have considered while calculating the probabilities.

does it change your findings

a marketing manager makes the statement that the long-run probability that a customer will the deluxe model to the standard model of product is 30%.what is the probability that more than tow in random sample of 10 customers will prefer the standard model?