There are x chocolates in each box. Ahmed buys 7 boxes while

Kevin buys 3 boxes. Write an expression for the total number of
chocolates.

The expression for the total number of chocolates can be written as:

(7 * x) + (3 * x)

There are d mangoes in a kilogram. Nora buys 4 kg but they are

so good she buys 2 kg more. Write an expression for the total
number Of mangoes Nora bought.

The expression for the total number of mangoes Nora bought can be written as:

4d + 2d

Let's call the total number of chocolates "C".

Since there are "x" chocolates in each box, Ahmed would have 7x chocolates.

Similarly, Kevin would have 3x chocolates.

Therefore, the expression for the total number of chocolates would be:

C = 7x + 3x

Simplifying this expression, we get:

C = 10x

So the total number of chocolates is 10 times the number of chocolates in each box.