(Q). What is the number of ways in which three numbers in A.P. can be selected from the given set {1, 2, 3, 4, 5, ……….. , 121}?Solution:- The given set { 1, 2, 3, 4, 5, ………..121} has odd & even integers.now let three numbers...
(Q). What is the number of ways in which three numbers in A.P. can be selected from the given set {1, 2, 3, 4, 5,…………120}? Solution:- The given set {1, 2, 3, 4, 5, ……….., 120} has 60 even & 60 odd integers. Now let three...
(Q). Find the number of ways in which three numbers in A.P. can be selected from a set of n integers {1, 2, 3, ………..n}.Solution:-From the given set let 3 numbers in A.P. be a, b and c.then b – a = c – b ...
(Q). A fruit basket has n identical mangoes, n identical oranges & n distinct fruit. what is the number of ways in which n fruits can be selected from the fruit basket?...
(Q). Out of 4 boys & 6 girls a team of 5 person is to be formed such that the team should have at least 1 boy and two boys named Rahul & Ankit refuse to work together. In how many ways team can be...
(Q). Out of 5 men & 10 women a team of 6 is to be formed such that at least one men is included in the team. In how many ways such a team can be formed?...
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