CBSE[Allahabad]_XII_Mathematics_2015_Set_01

The equation of a line is 5x – 3 = 15y + 7 = 3 – 10z. Write the direction cosines of the line.

To promote the making of toilets for women, an organisation tried to generate awareness through (i) house calls (ii) letters, and
(iii) announcements. The cost for each mode per attempt is given below:

1. `50
2. `20
3. `40

       The number of attempts made in three villages
       X, Y, and Z are given below:

1.    (ii)            (iii)

                 X     400        300            100
                 Y     300        250            75
                 Z     500        400            150

Find the total cost incurred by the organisation
for the three villages separately, using matrices.

Write one value generated by the organisation  
in the society.