Answer to Question #68872 in Statistics and Probability for joseph

Question

9. Set X has 8 elements and set Y has 10 elements, if there are 5 common elements in X and Y, what is the cardinality of X union Y?.

10. A ____________________ random variable is memoryless

1. Find the probability that seven of 10 persons will recover from a tropical disease if we can assume independence and the probability is 0.80 that any one of them will recover from the disease.

2. How many runs of W do your have in the following sequences WWWLWWLLWLWWLLWWW

3. A student is to answer all the eight questions in an examination. It is believed that the sequence in which the questions are answered may have a considerable effect on the performance of the student. In how many different order can the question be answered?