Find the number of all onto functions from the set {1,2,3,… ,n) to itself.
31.8
25.4
12.4
4.3
4.1
22.0
(i) Represent the information given above graphically. (ii) Which condition is the major cause of women’s ill health and death worldwide? (iii) Try to find out, with the help of your teacher, any two factors which play a major role in the cause in (ii) above being the major cause.
A vertical pole of length 6 m casts a shadow 4 m long on the ground and at the same time a tower casts a shadow 28 m long. Find the height of the tower.
Write first five multiples of :
\[ x - 2y = 10, \quad 2x - y - z = 8, \quad -2y + z = 7. \]
Minimise \( z = 5x - 2y \)
\[ x + 2y \leq 120, \\ x + y \geq 60, \\ x - 2y \geq 0, \\ x \geq 0, \\ y \geq 0. \]