Explanation

Let P, Q and R represent their respective monthly incomes. Then, we have:

P + Q = (5050 x 2) = 10100 .... (i)

Q + R = (6250 x 2) = 12500 .... (ii)

P + R = (5200 x 2) = 10400 .... (iii)

Adding (i), (ii) and (iii), we get: 2(P + Q + R) = 33000 or P + Q + R = 16500 .... (iv)

Subtracting (ii) from (iv), we get P = 4000

Therefore P's monthly income = Rs. 4000

Explanation

To determine the selling price, we can use the formula:

Selling Price = Cost of Goods Sold (COGS) + Gross Profit

In this case,

the COGS is RS 120

and the gross profit is RS 80.

So, the selling price would be:

Selling Price = RS 120 + RS 80

Selling Price = RS 200

Explanation

Explanation

Given that the sum of 3, 7, and x is 18:

3 + 7 + x = 18

Combine constants:

10 + x = 18

Subtract 10 from both sides:

x = 8

Now, find the average (arithmetic mean) of 3, 7, and x:

Average = (3 + 7 + x) / 3

= (3 + 7 + 8) / 3

= 18 / 3

= 6

Explanation

1. Let's denote the son's age as "S", the father's age as "F", and the mother's age as "M".

2. According to the information provided:

- The age of the father is 9 times greater than the son's age: F = 9S

- The age of the mother is 8 times greater than the son's age: M = 8S

- The sum of the father and mother's ages is 51: F + M = 51

3. Substituting the expressions for F and M from the first two statements into the third equation:

- 9S + 8S = 51

- 17S = 51

- S = 51 / 17

- S = 3

Explanation

The cost of 8 Books is 950.

One Book Cost = 950/8

=118.75

Then the cost of 12 books is = 12 × 118.5

                                      = RS. 1425

SH5-9-2023

Explanation

Explanation

Explanation

Explanation