Chapter 3 Permutations and Combination Ex 3.6 Chapter 3 Permutations and Combination Ex 3.6 Question 1.Find the value of(a) 15C4Solution: (b) 80C2Solution: (c) 15C4 +15C5Solution: (d) 20C16 -19C16Solution: Question 2.Find n ifSolution: Solution: Solution:…
Chapter 3 Permutations and Combination Ex 3.5 Chapter 3 Permutations and Combination Ex 3.5 Question 1.In how many different ways can 8 friends sit around a table?Solution: We know that…
Chapter 3 Permutations and Combination Ex 3.4 Chapter 3 Permutations and Combination Ex 3.4 Question 1.Find the number of permutations of letters in each of the following words.(i) DIVYA(ii) SHANTARAM(iii)…
Chapter 3 Permutations and Combination Ex 3.3 Chapter 3 Permutations and Combination Ex 3.3 Question 1. ∴ (n – 3) (n – 4) (n – 5) = 120 ∴ (n…
Chapter 3 Permutations and Combination Ex 3.2 Chapter 3 Permutations and Combination Ex 3.2 Question 1.Evaluate:(i) 8!Solution: 8! = 8 × 7 × 6 × 5 × 4 × 3…
Chapter 3 Permutations and Combination Ex 3.1 Chapter 3 Permutations and Combination Ex 3.1 Question 1.A teacher wants to select the class monitor in a class of 30 boys and…
Chapter 2 Sequences and Series Miscellaneous Exercise 2 Chapter 2 Sequences and Series Miscellaneous Exercise 2 (I) Select the correct answer from the given alternative: Question 1.The common ratio for…
Chapter 2 Sequences and Series Ex 2.6 Chapter 2 Sequences and Series Ex 2.6 Question 1.Solution: Question 2.Solution: Question 3.Solution: Question 4. Solution: Question 5.Find the sum 5 × 7…
Chapter 2 Sequences and Series Ex 2.5 Chapter 2 Sequences and Series Ex 2.5 Question 1.Find Sn of the following arithmetico-geometric sequences. Here, 2, 4, 6, 8, 10,… are in…
Chapter 2 Sequences and Series Ex 2.4 Chapter 2 Sequences and Series Ex 2.4 Question 1. ∴ The reciprocal sequence is not an A.P. ∴ The given sequence is not…