Permutation and Combination – Page 29

A-general-case-we-have-totally-n-letters-among-them-n-1-times-A-n-2-times-B-n-3-times-C-n-4-times-D-etc-n-1-n-2-n-3-n-4-2-n-gt-n-1-n-2-n-3-n-4-how-many-different-words-

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Question Number 107844 by mr W last updated on 13/Aug/20 $A g e n e r a l c a s e :$ $w e h a v e t o t a l l y n l e t t e r s, a m o n g t h e m$ $n_{1} t i m e s A, n_{2} t i m e s B, n_{3} t i m e s C,$ $n_{4} t i m e s D e t c .$ $$\left({n}_{\mathrm{1}} ,{n}_{\mathrm{2}} ,{n}_{\mathrm{3}}…

A-three-digit-odd-number-less-than-500-is-to-be-formed-from-1-2-3-4-and-5-If-repetition-of-digits-is-allowed-in-how-many-ways-can-this-be-done-

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Question Number 173354 by pete last updated on 10/Jul/22 $A three - digit odd number less than 500$ $is to be formed from 1, 2, 3, 4 and 5 . If repetition$ $of digits is allowed, in how many ways$ $can this be done ?$ Commented by pete last updated on 10/Jul/22…

Question-42107

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Question Number 42107 by rahul 19 last updated on 18/Aug/18 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question-42110

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Question Number 42110 by rahul 19 last updated on 18/Aug/18 Commented by Tawa1 last updated on 19/Aug/18 $sweet$ Answered by tanmay.chaudhury50@gmail.com last updated…

Question-42106

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Question Number 42106 by rahul 19 last updated on 18/Aug/18 Answered by tanmay.chaudhury50@gmail.com last updated on 18/Aug/18 $5 c_{2} \times 2! + 5 c_{3} \times 3! + 5 c_{4} \times 4! + 5 c_{5} \times 5!$ $$=\mathrm{5}{p}_{\mathrm{2}} +\mathrm{5}{p}_{\mathrm{3}}…

Question-173014

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Question Number 173014 by abdi last updated on 04/Jul/22 Terms of Service Privacy Policy Contact: info@tinkutara.com

How-many-words-can-you-form-using-the-letters-in-UNUSUALLY-such-that-no-same-letters-are-next-to-each-other-Answer-10200-

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Question Number 107451 by mr W last updated on 11/Aug/20 $H o w m a n y w o r d s c a n y o u f o r m u s i n g$ $t h e l e t t e r s i n U N U S U A L L Y$ $s u c h t h a t n o s a m e l e t t e r s a r e n e x t$ $t o e a c h o t h e r ?$ $[A n s w e r : 10200]$ Commented by…

if-n-C-5-n-C-11-find-18-C-n-

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Question Number 41824 by Tawa1 last updated on 13/Aug/18 $if \overset{n}{} C_{5} = \overset{n}{} C_{11} find \overset{18}{} C_{n}$ Answered by $@ t y @ m l a s t u p d a t e d o n 13 / A u g / 18$ $\:\:^{{n}}…

1-p-k-n-show-that-k-p-n-C-k-1-p-1-C-n-p-please-i-need-help-

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Question Number 107327 by pticantor last updated on 10/Aug/20 $1 ⩽ p ⩽ k ⩽ n$ $s h o w t h a t \underset{k = p}{\sum^{n}} C_{k - 1}^{p - 1} = C_{n}^{p}$ $p l e a s e i n e e d h e l p$ Terms of Service Privacy…

Question-172817

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Question Number 172817 by Mikenice last updated on 01/Jul/22 Answered by som(math1967) last updated on 02/Jul/22 $\sqrt{2 + \sqrt{2 + \sqrt{2 (1 + c o s 8 θ)}}}$ $\sqrt{2 + \sqrt{2 + 2 c o s 4 θ}}$ $\sqrt{2 + \sqrt{2 (1 + c o s 4 θ)}}$ $\sqrt{2 + 2 c o s 2 θ} = \sqrt{2 (1 + c o s 2 θ)} = 2 c o s θ$ …

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