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IGNOU UNIVERSITY MCA - I (SEM 1) DEC 2009 : Discrete Mathematics

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I MCS-013 I MCA (Revised) Term-End Examination December, 2009 oo MCS-013 : DISCRETE MATHEMATICS Time : 2 hours Maximum Marks : 50 Note : Question number 1 is compulsory. Attempt any three questions from the rest. 1. (a) If a five digit number is chosen at random, what is the probability that the product of the digits is 20 ? If the function f : R -* R is defined by f (x) = x2 . Find r 1 (4) and r 1 ( - 4). In how many ways can a prize winner choose any 3 CDs from the 'Ten Best' list ? Let A= {a, b} be a given set and R = ((a, a), (b, a), (b, b)} and S= {(a, b), (b, a), (b, b)} be relations on A. Then verify (s0R)-1_, R -1 o s-1. Find contrapositve of : If John is a poet then he is poor. Only if Marc studies will he pass the test. (f) Show that r > n 3 for n.?-. 10. MCS-013 1 3 4 3 3 3 4 P.T.O.

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Additional Info : Mca - I (sem 1) December 2009 Question Paper - Discrete Mathematics(Revised Course)
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