SOLUTION: 1. please help me with this question. M and F are complementary events. Also q and v are complementary events. given that p(M)=30% p(q)=20% p(FUV)= 55% find the following p(MUQ),P

Algebra ->  Probability-and-statistics -> SOLUTION: 1. please help me with this question. M and F are complementary events. Also q and v are complementary events. given that p(M)=30% p(q)=20% p(FUV)= 55% find the following p(MUQ),P      Log On


   

Question 1173140: 1. please help me with this question. M and F are complementary events. Also q and v are complementary events. given that p(M)=30% p(q)=20% p(FUV)= 55% find the following p(MUQ),P(Q/F),P(F/V).
2. In a set of 12 calculator, 5 are defective in the group. how many ways can 4 calculator be selected from this set where the number of defectives in the group is2? please help me.
Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.

            I will help you with part  (2),  ONLY.
            ----------------------------------------- 


Actually, according to the problem's context, you select 2 defective calculators from 5 defective,


and then add to these 2 -- two other good calculators, selecting them from 12-5 = 7 good calculators.


The first  selection can be made in  C%5B5%5D%5E2 = %285%2A4%29%2F2 = 10 ways.


The second selection can be made in  C%5B7%5D%5E2 = %287%2A6%29%2F2 = 21 ways.


Hence, the whole selection can be made in 10*21 = 210 ways.    ANSWER

Solved.


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