English, asked by bhavnamaghade, 5 months ago

इन हाउ मेनी वेस कैंटीन परसों भी इनवाइट फॉर द डिनर फ्रॉम अमोंग फ्रेंड्स एंड सेवन रिलेटेड टू इंक्लूड एग्जैक्ट ली थी रिलेटिव्स​

Answers

Answered by nazish909
0

ANSWER

Case I : Invite 2 friends for 3 night each

No.of ways =

3

C

2

6

C

3

3

C

3

choosing 3 digits out of 6

choosing 3 nights out of remaining 3 nights

Case II : Invite 1 friend 3 times, another friend 2 times & third friend 1 time , No of ways =3!

6

C

3

3

C

2

1

C

1

Case III: Invite all three friends 2 times

No. of ways =

6

C

2

4

C

2

2

C

2

Total no of ways =

3

C

2

6

C

3

3

C

3

+3!

6

C

2

1

C

1

+

6

C

2

4

C

2

2

C

2

=

3!6!

3×6!

+

3!3!

6×6!

×3+

2!4!

6!

2!2!

4!

=

3!2!

6×6!

+3×

3!3!

6!

+

2!2!2!

6!

Option A is correct

Explanation:

I hope it's useful

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