(Q). In how many ways a team of p students can be selected from q students such that r student are always included & s students are always included?Solution:- ᑫ ⁻ ʳ ⁻ ˢCₚ ₋ ᵣ ...
(Q). In how many ways 7 players can be selected out of 15 players if Virat is always included?Solution:- Sincec Virat is always included∴ number of ways of selection = ¹⁵⁻¹C₇₋₁ ...
(Q). Let there are 8 oranges, 6 mangoes & 3 apples(i) How many selection of fruits can be made?(ii) How many selection of fruits can be made such that at least 1 apple is always included?(iii) How many selection of fruits can be made such that at least one fruit...
(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...
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