Please Solve RD Sharma Class 12 Chapter Algebra of Matrices Exercise 4.2 Question 21 Maths Textbook Solution.
Hint: Put a matrix for peons, clerks, typist, sector officers. Multiply with 30 for calculating all 30 colleges.
Given: There are 30 colleges. Each college has 15 peons, 6 clerks, 1 typist and 1 sector officer.
No. of different types of posts in any college is given by:
Total no. of posts of each kind in all the colleges = 30X