      Q) Find the angle between the pair of straight lines: x – 4 y = 3 and 6 x – y = 11. [Practice Paper 1, 2023-24, Dir of Edu, GNCT of Delhi] Ans: The equations of the lines are x – 4y = 3 and 6 x – y […]
Find the angle between the pair of straight lines x-4y=3 and 6x-y=11 Read More »
      Q) A bag contains 6 red, 4 white and 8 blue balls. If three balls are drawn at random, find the probability that: (i) One is red and two are white (ii) Two are blue and one is red (iii) One is red [Practice Paper 1, 2023-24, Dir of Edu,
A bag contains 6 red, 4 white and 8 blue balls. If three balls are Read More »
      Q) In an AP first term is 2 and the sum of the first five terms is one- fourth of next five terms, show that 20th term is -112. [Practice Paper 1, 2023-24, Dir of Edu, GNCT of Delhi] Ans: [Here, we are given value of a, value of d
In an AP first term is 2 and the sum of the first five terms is one- fourth Read More »
      Q) If the coefficient of (r-5)th and (2r-1)th term in the expansion of (1+x)34 are equal, then find the value of r. [Practice Paper 1, 2023-24, Dir of Edu, GNCT of Delhi] Ans: Step 1: Since in binomial expansion of (x + y)n, the term Tr+1 is given by: Tr+1 = Xn-r
If the coefficient of (r-5)th and (2r-1)th term in the expansion of (1+x)34 Read More »