Team Gmath Exercise 7.2(Permutations and Combinations) Exercise 7.2 ncert solutions maths class 11 Question 1: Evaluate (i) 8! (ii) 4! – 3! Solution: (i) Given 8! We know that 8! = 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 40320 (ii) Given 4!-3! 4! – 3! = (4 × 3!) … Read more
Exercise 7.1(Permutations and Combinations) Ncert math solution(Exercise 7.1 ncert solutions maths class-11) Question 1: How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5, assuming that (i) Repetition of the digits is allowed? (ii) Repetition of the digits is not allowed? Solution: 3-digit numbers can be formed from the … Read more
Chapter 6(Miscellaneous Exercise) Class 11 Math Solve the inequalities in Exercises 1 to 6.I(Chapter 6 Miscellaneous ncert math solution class 11) Question 1: 2 ≤ 3x – 4 ≤ 5 Solution: Given that, 2 ≤ 3x – 4 ≤ 5 ⇒ 2 ≤ 3x – 4 ≤ 5 ⇒ 2 + 4 ≤ 3x – 4 + … Read more
Exercise 6.3(Linear Inequalities) Solve the following system of inequalities graphically:(Ex 6.3 Linear Inequalities ncert math solution class 11) Question 1: x ≥ 3, y ≥ 2 Solution : Given that, x ≥ 3 …..(i) y ≥ 2…….(ii) The graph of the lines x = 3 and y = 2 are drawn in the figure below. … Read more
Exercise 6.2(Linear Inequalities ) Solve the following inequalities graphically in two-dimensional plane:(Ex 6.2 Linear Inequalities ncert math solution class 11) Question 1: x + y < 5 Solution: Given that x 0 5 y 5 0 Now, draw a dotted line x + y = 5 in the graph Now, consider x + y < … Read more
Exercise 6.1 (Linear Inequalities) Ex 6.1 Linear Inequalities ncert math solution class 11 Question 1: Solve , when (i) is a natural number. (ii) is an integer. Solution: Given that: (i) is a natural number. Hence, in this case, the solution set . (ii) is an integer. The integers less than are …-3, . Hence, … Read more
Chapter – 5(Miscellaneous Exercise) Complex Numbers and Quadratic Equations Chapter 5 Miscellaneous ncert math solution class 11 Question 1: Evaluate: Solution : Given Question 2: For any two complex numbers and , prove that: Solution: Let and Therefore, Now Question 3: Reduce to the standard form. Solution :Given that Question 4: If prove that Solution … Read more
Question:- A and B throw a die alternatively till one of them gets ‘6’ and win the game. Find their respective probabilities of winning, If A starts first Solution: Let S denote the success(getting a ‘6’) and F denote the failure(Not getting a ‘6’). Thus, P(A wins in the … Read more
Question:- Two balls are drawn at random one by one with replacement from an urn containing equal number of red balls and green balls. Find the probability distribution of number of red balls. Also, find the mean of the random variable. Solution:- Let X represent the number of red balls Possible value of X = … Read more
Question:- Find the equations of the diagonals of the parallelogram PQRS whose vertices are P(4, 2, -6), Q(5, -3, 1), R(12, 4, 5) and S(11, 9, -2). Use these equations to find the point of intersection of diagonals. Solution:- Vertices of parallelogram PQRS are P(4, 2, -6), Q(5, -3, 1), R(12, 4, 5) and S(11, … Read more