The number of tickets required can be calculated using the formula for combinations in mathematics, which is n(n-1)/2, where n is the number of items (in this case, stations).

Here's the step-by-step calculation:

1. Identify the total number of stations. In this case, it's 20.

2. Plug the number of stations into the formula. So, it becomes 20(20-1)/2.

3. Calculate the expression in the parentheses first, according to the order of operations (also known as BIDMAS/BODMAS/PEDMAS). So, it becomes 20*19/2.

4. Multiply 20 by 19 to get 380.

5. Finally, divide 380 by 2 to get 190.

So, 190 tickets are required in order that it may be possible to book a passenger from every station to every other station.

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The number of tickets required can be calculated using the formula for combinations in mathematics, which is n(n-1)/2, where n is the number of items (in this case, stations).

Here's the step-by-step calculation:

1. Identify the total number of stations. In this case, it's 20.

2. Plug the number of stations into the formula. So, it becomes 20(20-1)/2.

3. Calculate the expression in the parentheses first, according to the order of operations (also known as BIDMAS/BODMAS/PEDMAS). So, it becomes 20*19/2.

4. Multiply 20 by 19 to get 380.

5. Finally, divide 380 by 2 to get 190.

So, 190 tickets are required in order that it may be possible to book a passenger from every station to every other station.

Knowee AI · Accepted Answer

The number of tickets required can be calculated using the formula for combinations in mathematics, which is n(n-1)/2, where n is the number of items (in this case, stations).

Here's the step-by-step calculation:

1. Identify the total number of stations. In this case, it's 20.

2. Plug the number of stations into the formula. So, it becomes 20(20-1)/2.

3. Calculate the expression in the parentheses first, according to the order of operations (also known as BIDMAS/BODMAS/PEDMAS). So, it becomes 20*19/2.

4. Multiply 20 by 19 to get 380.

5. Finally, divide 380 by 2 to get 190.

So, 190 tickets are required in order that it may be possible to book a passenger from every station to every other station.

On a railway tract, there are 20 stations. The number of tickets required in order that it may be possible to book a passanger from every station to every station after is

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