Permutation and Combination – Page 20

The-number-1-2-3-4-7-are-randomly-divided-into-two-non-empty-subsets-The-probability-that-the-sum-of-the-numbers-in-the-two-subsets-being-equal-is-r-s-expressed-in-the-lowest-term-Find-r-s-

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Question Number 116397 by john santu last updated on 03/Oct/20 $T h e n u m b e r 1, 2, 3, 4, \dots, 7 a r e r a n d o m l y$ $d i v i d e d i n t o t w o n o n - e m p t y s u b s e t s .$ $T h e p r o b a b i l i t y t h a t t h e s u m o f t h e$ $n u m b e r s i n t h e t w o s u b s e t s b e i n g$ $e q u a l i s \frac{r}{s} e x p r e s s e d i n t h e l o w e s t$ $t e r m . F i n d r + s ?$ Answered by…

A-five-digits-number-divisible-by-3-is-to-be-formed-using-the-number-0-1-2-3-4-and-5-without-repetition-The-total-number-of-ways-this-can-be-done-is-

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Question Number 116360 by bemath last updated on 03/Oct/20 $A five digits number divisible by 3$ $is to be formed using the number$ $0, 1, 2, 3, 4 and 5 without repetition$ $The total number of ways this can$ $be done is__$ Answered by mr W last…

a-man-goes-in-for-an-examination-in-which-there-are-4-papers-which-maxmum-of-10-marks-for-each-paper-the-no-of-ways-of-getting-20-marks-on-the-whole-is-ans-891-

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Question Number 50724 by vajpaithegrate@gmail.com last updated on 19/Dec/18 $a man goes in for an examination in$ $which there are 4 papers which maxmum$ $of 10 marks for each paper the no of ways$ $of getting 20 marks on the whole is$ $ans : 891$ Answered by ajfour last updated…

Question-116177

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Question Number 116177 by Khalmohmmad last updated on 01/Oct/20 Commented by Dwaipayan Shikari last updated on 01/Oct/20 $\tan (x - \frac{π}{2}) \tan (x + \frac{π}{2}) = 1$ $\tan (x - \frac{π}{2}) = \cot (x + \frac{π}{2})$ $\tan (x - \frac{π}{2}) = \tan (- x)$ $$\mathrm{x}−\frac{\pi}{\mathrm{2}}=\mathrm{k}\pi+\left(−\mathrm{x}\right) \…

Question-115988

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Question Number 115988 by bemath last updated on 30/Sep/20 Commented by mr W last updated on 01/Oct/20 $\frac{7!}{2! 2!} - 2 \times \frac{6!}{2!} + 5! + 2 \times (\frac{5!}{2!} - 4!) = 732$ Commented by bemath last updated…

The-secret-number-is-made-from-the-numbers-1-2-2-3-3-4-5-Many-secret-numbers-can-be-created-if-the-same-number-is-not-adjacent-except-in-the-first-two-place-is-a-1142-b-1212-c-1246-d-

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Question Number 115902 by bemath last updated on 29/Sep/20 $T h e s e c r e t n u m b e r i s m a d e f r o m$ $t h e n u m b e r s 1, 2, 2, 3, 3, 4, 5 .$ $M a n y s e c r e t n u m b e r s c a n b e c r e a t e d$ $i f t h e s a m e n u m b e r i s n o t a d j a c e n t$ $e x c e p t i n t h e f i r s t t w o p l a c e i s_$ $(a) 1142 (b) 1212 (c) 1246$ $(d) 1248 (e) 1250$ Terms…

A-delegation-of-4-students-is-to-be-selected-from-a-total-of-12-students-In-how-many-ways-can-the-delegation-be-selected-if-1-2-particular-students-wish-to-be-included-together-only-in-the-delegat

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Question Number 50258 by rahul 19 last updated on 15/Dec/18 $A d e l e g a t i o n o f 4 s t u d e n t s i s t o b e$ $s e l e c t e d f r o m a t o t a l o f 12 s t u d e n t s .$ $I n h o w m a n y w a y s c a n t h e d e l e g a t i o n$ $b e s e l e c t e d i f :$ $1) 2 p a r t i c u l a r s t u d e n t s w i s h t o b e$ $i n c l u d e d t o g e t h e r o n l y i n t h e d e l e g a t i o n ?$ $2) 2 p a r t i c u l a r s t u d e n t s r e f u s e t o b e$ $${together}\:{and}\:\mathrm{2}\:{other}\:{particular}\:{students}…

There-are-3-teachers-and-6-students-who-will-sit-on-the-9-available-seats-many-arrangements-they-sit-if-each-teacher-is-flanked-by-2-students-

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Question Number 115769 by bemath last updated on 28/Sep/20 $T h e r e a r e 3 t e a c h e r s a n d 6 s t u d e n t s$ $w h o w i l l s i t o n t h e 9 a v a i l a b l e s e a t s . m a n y$ $a r r a n g e m e n t s t h e y s i t i f e a c h$ $t e a c h e r i s f l a n k e d b y 2 s t u d e n t s$ Answered by mr W last updated on…

Question-181251

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Question Number 181251 by cortano1 last updated on 23/Nov/22 Commented by cortano1 last updated on 23/Nov/22 $A photograph is to be taken of seven girls$ $standing in two rows, with one row$ $in front of the other . The tallest girl$ $must be in the midlle of the row of$ $$\mathrm{three}\:\mathrm{and}\:\mathrm{the}\:\mathrm{shortest}\:\mathrm{girl}\:\mathrm{must}\:\mathrm{be}…

5-digit-number-divisible-by-3-formed-using-0-1-2-3-4-5-without-repetition-Total-number-of-such-no-s-is-

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Question Number 50008 by rahul 19 last updated on 13/Dec/18 $5 - d i g i t n u m b e r d i v i s i b l e b y 3 f o r m e d$ $u s i n g 0, 1, 2, 3, 4, 5 w i t h o u t r e p e t i t i o n .$ $T o t a l n u m b e r o f s u c h n o . s i s ?$ Commented by rahul 19 last updated on 13/Dec/18…

Category: Permutation and Combination