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Kindly provide PDF if there is a copy version.

Sincerely,
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in Question related to SINISTER :

I think there is an error...

Total cases:

SINISTER can be arranged in 8!/2!∗2!8!/2!∗2! = 10080 ways OK

Number of cases in which both the S are together:

Two S always has to be together, so we can group together as SS.
We can assume SS to be one letter as they will only be arranged like a letter with the other 6 letters.
• Thus, total words = 6 letters other than S+ 1 group of two S

However, SS is actually a 2-letter word which can arrange in itself.

Thus, Total ways when both the S are together= arrangement of 7 letters * arrangements in the group SS
• Total ways= 7! * 1(SS can be arranged in only 1 way)
Total ways when both the S are together= 7! = 5040 ways Repetition of N is not considered .
Thus, total cases in which two S are never together= 10080- 5040/2!= 10080 - 2520 = 7560 ways.
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GMAT215
in Question related to SINISTER :

I think there is an error...

Total cases:

SINISTER can be arranged in 8!/2!∗2!8!/2!∗2! = 10080 ways OK

Number of cases in which both the S are together:

Two S always has to be together, so we can group together as SS.
We can assume SS to be one letter as they will only be arranged like a letter with the other 6 letters.
• Thus, total words = 6 letters other than S+ 1 group of two S

However, SS is actually a 2-letter word which can arrange in itself.

Thus, Total ways when both the S are together= arrangement of 7 letters * arrangements in the group SS
• Total ways= 7! * 1(SS can be arranged in only 1 way)
Total ways when both the S are together= 7! = 5040 ways Repetition of N is not considered .
Thus, total cases in which two S are never together= 10080- 5040/2!= 10080 - 2520 = 7560 ways.


Hey GMAT215

I think you meant, repetition of I is not considered! :)

We have updated the article. Thanks for pointing this out. I guess this clearly shows that anyone can fall for these deadly traps! :shocked
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Hey Everyone,

Official solution to all the practice questions has been posted.

Regards,
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Hey everyone,

We have added the pdf of the article. :-)

Happy learning,

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Dear Students,

We have added a new article to help you get clarity on how to avoid the 3 common mistakes in probability.

You can go through the article from this 3 deadly mistakes you must avoid in Probability
Stay tuned for more articles.

Happy learning. :)

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Hey Everyone,




We have added 4 practice questions on the concepts of Permutation and Combination.


P&C Practice Question 1

P&C Practice Question 2

P&C Practice Question 3

P&C Practice Question 4



Detailed solutions will be posted soon


Happy Learning! :)
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Hey everyone,

The solutions to all the P&C Practice Questions have been posted. :-)

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Thank you for the post, so helpful
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Hey laknaouiwarda1,

It feels great to hear that the article helped you.

To read similar articles: Must Read Articles and Practice Questions to score Q51 !!!!


You can solve the practice questions to test your understanding.

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Hey Everyone,




We have added three more question for your practice.

Do solve the questions and post your solutions.

Practice Questions


Practice Question 1

Practice Question 2

Practice Question 3




Detailed solutions will be posted soon.

Happy Learning! :)
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Hello everyone,


We have posted the official answer to the practice questions.

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Hey Everyone,



We've added 3 practice questions in which you can apply your learning of Probability concepts.

Exercise Questions


Question 1

Question 2

Question 3



Detailed solutions will be posted soon.


Happy Learning! :)
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Hey everyone,

The official answers to all the practice questions have been posted.

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Hey Everyone,



We've added 3 practice questions in which you can apply your learning of Probability concepts.

Exercise Questions


Question 1

Question 2

Question 3



Detailed solutions will be posted soon.


Happy Learning! :)
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Hey everyone,

The official answers to all the practice questions have been posted.

Regards,
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Hey Everyone,



We've added 3 practice questions in which you can apply your learning of P&C and Probability concepts.

Practice Exercise Questions


Question 1

Question 2

Question 3



Detailed solutions will be posted soon.


Happy Learning! :)

Regards,
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