Math 17300 Introduction to Probability and Statistics l. Suppose there are sever
ID: 3335752 • Letter: M
Question
Math 17300 Introduction to Probability and Statistics l. Suppose there are several claseses that are put into two levels. Level A contains 2 math clase and 1 physics class. Level B contains 3 inath cla… and 2 physics close. You nip. fair eean and if it lands head you choose one math class, if it lands tail you choose one physics elm (1).(10 points) Find the probability of choosing a class fron level (5 points) Find the probability that the coin landed head, given that you choose a level A class.Explanation / Answer
1) probability of choosing a class from level A =P( head and math class from level A +tail and physics class from level B)
=(1/2)*(2/5)+(1/2)*(1/3) =11/30
2)probability of head given chooses class from level A =P( head and math class from level A)/P(from level A)
=(1/2)*(2/5)/(11/30) =6/11