Question

The average school fee per month of 3 boys is rupees 425.If the average fee of two of them is rupees 400 find the monthly school fee for the third boys.​

Answer 1

Answer:

475

Step-by-step explanation:

The average fee per month of three boys is 425

Total fees per month of three boys = 3 * 425 = 1275

the average fee of two boys is 400

Total fees per month of two boys = 2 * 400 = 800

Fee of third boy = 1275 - 800 = 475

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Answer 2

Answer:

• The monthly school fee of third boy is Rs. 475.

Step-by-step explanation:

Given :

• Average school fee per month of 3 boys is Rs. 425.
• Average fee of two of them is Rs. 400.

To Find :

• Monthly school fee of third boy.

Calculations :

Here it's provided that average school fee for per month of 3 boys is Rs. 425 & average fee for two of them is Rs. 400. And we are asked to calculate the monthly school fee of the third boy.

Average school fee for per month of 3 boys,

$\mapsto \sf {Rs. 425}$

Average fee of two of them [2 boys],

$\mapsto \sf {Rs. 400}$

So, firstly let's find the total amount of school fee for three of them, [3 boys]

• It's provided that average school fee for per month of 3 boys is Rs. 425. So in order to calculate the total amount of school fee of three boys, we will multiply 3 with Rs. 425.

$\mapsto \sf 3 \times Rs. \: 425$

$\mapsto \rm{ \red{Rs. \: 1275}}$

• So, total amount of school fee for 3 boys is Rs. 1275.

Now, in order to calculate the average school fee for two boys,

• As per the provided question, it's given that average fee of two boys is Rs. 400.

• So by performing multiplication [we'll multiply Rs. 400 with 2] and will calculate the average fee for two boys.

$\mapsto \sf{Rs. \: 400 \times 2}$

$\mapsto \rm{ \green{Rs. \: 800}}$

• Hence, average school fee for two boys is Rs. 800. [Totally]

$\dag$ According to the Question,

Now coming to the question, we have to calculate the monthly school fee for the third boy.

We'll calculate the monthly school fee for third boy by performing subtraction in,

• Total amount of school fee - Total amount of average school fee [for two boys]

$\mapsto \sf{Rs. \: 1275 - 800}$

$\mapsto \boxed{\rm{ \pink{Rs. \: 475}}} \: \blue{\bigstar}$

Therefore,

• The monthly school fee for three boys is Rs. 475.