A mixture of paint is prepared by mixing 2 parts of red pigments with 5 parts of the base. Using the given information in the following table, find the values of a, b and c to get the required mixture of paint.

1. a = 10, b = 10, c = 10

2. a = 5, b = 2, c = 5

3. a = 10, b = 5, c = 10

4. a = 10, b = 5, c = 15

If (x + 1) : 8 = 3.75 : 7 then value of x is :

1. $1\dfrac{2}{7}$

2. $2\dfrac{2}{7}$

3. $3\dfrac{2}{7}$

4. $4\dfrac{2}{7}$

0.5 of a number is equal to 0.07 of another. The ratio of the numbers is :

1. 1 : 14

2. 5 : 7

3. 7 : 50

4. 50 : 7

25% of x is equal to 35% of y, then x : y equals to :

1. 5 : 7

2. 7 : 5

3. 13 : 15

4. 15 : 13