Probability and Statistics – Page 49

A-multiple-choice-quiz-has-200-questions-each-with-4-possible-answers-of-which-only-1-is-the-correct-answer-What-is-the-probability-that-sheer-guesswork-yields-from-25-to-30-correct-answer-for-8

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Question Number 133021 by liberty last updated on 18/Feb/21 $A multiple - choice quiz has 200$ $questions each with 4 possible$ $answers of which only 1 is the correct$ $answer . What is the probability$ $that sheer guesswork yields$ $from 25 to 30 correct answer for$ $80 of the 200 problems about which$ $$\mathrm{the}\:\mathrm{student}\:\mathrm{has}\:\mathrm{no}\:\mathrm{knowledge}?\: \…

John-and-Ghina-have-a-date-at-a-given-time-and-each-will-arrive-at-the-meeting-place-with-a-delay-between-0-and-1-hour-with-all-pairs-of-delays-being-equally-likely-The-first-arrive-will-wait-for-1

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Question Number 132548 by liberty last updated on 15/Feb/21 $John and Ghina have a date at$ $a given time, and each will arrive$ $at the meeting place with a delay between$ $0 and 1 hour, with all pairs of$ $delays being equally likely .$ $The first arrive will wait for$ $15 minutes and will leave if$ $$\mathrm{the}\:\mathrm{other}\:\mathrm{has}\:\mathrm{not}\:\mathrm{yet}\:\mathrm{arrived}.\:\mathrm{What} \…

A-conservative-design-team-call-it-C-and-innovative-design-team-call-it-N-are-asked-to-separately-design-a-new-product-within-a-month-From-past-experience-we-know-that-a-The-probability-that-te

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Question Number 132551 by liberty last updated on 15/Feb/21 $A conservative design team, call it C$ $and innovative design team call$ $it N, are asked to separately design$ $a new product within a month .$ $From past experience we know that$ $(a) The probability that team C is successful is 2 / 3$ $(b) The probability that team N is successful 1 / 2$ $$\left(\mathrm{c}\right)\:\mathrm{The}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{at}\:\mathrm{least}\:\mathrm{one} \…

Question-132086

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Question Number 132086 by SLVR last updated on 11/Feb/21 Commented by mr W last updated on 11/Feb/21 ${i t}^{'} s g e t t i n g b o r i n g!$ $p l e a s e s t o p p o s t i n g e m p t y p o s t s s i r!$ $${try}\:{to}\:{study}\:{how}\:{to}\:{use}\:{the}\:{forum}\:{by}…

The-number-of-hits-per-minute-on-a-website-is-0-8-It-is-shown-that-the-time-T-between-two-successive-hits-follows-a-negative-exponential-distribution-f-t-0-8e-0-8t-t-0-It-is-required-to-

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Question Number 973 by Yugi last updated on 10/May/15 $T h e n u m b e r o f h i t s p e r m i n u t e o n a w e b s i t e i s 0.8 . I t i s s h o w n t h a t t h e t i m e T$ $b e t w e e n t w o s u c c e s s i v e h i t s f o l l o w s a n e g a t i v e e x p o n e n t i a l d i s t r i b u t i o n$ $f (t) = 0.8 e^{- 0.8 t} (t ⩾ 0) . I t i s r e q u i r e d t o d e t e r m i n e t h e p r o b a b i l i t y t h a t t h e t i m e$ $b e t w e e n t h e 1 s t h i t a n d t h e 51 s t e x c e e d s o n e h o u r . O n e a p p r o a c h t o t h e$ $c a l c u l a t i o n s t a t e d t h a t t h e r e q u i r e d p r o b a b i l i t y i s$ $P (n o . o f h i t s i n 60 m i n s < 50) (*)$ $C a n a n y o n e e x p l a i n t o m e w h y i t i s t h a t$ $${P}\left({time}\:{between}\:\mathrm{1}{st}\:{hit}\:{and}\:\mathrm{51}{st}\:{hit}\:>\:\mathrm{60}{mins}\right)=\:\left(\ast\right)\:?…

Ninety-students-including-Joe-and-Jane-are-to-be-split-into-three-classes-of-equal-size-and-is-to-be-done-at-random-What-is-the-probability-that-Joe-and-Jane-end-up-in-the-same-class-

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Question Number 131975 by liberty last updated on 10/Feb/21 $Ninety students, including Joe$ $and Jane are to be split into$ $three classes of equal size and is$ $to be done at random . What is$ $the probability that Joe and Jane$ $end up in the same class ?$ Commented by liberty…

In-how-many-ways-may-a-line-consisting-of-4-men-and-4-women-be-acquired-if-no-two-women-are-to-be-adjacent-to-each-other-

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Question Number 870 by 112358 last updated on 05/Apr/15 $I n h o w m a n y w a y s m a y a l i n e$ $c o n s i s t i n g o f 4 m e n a n d 4 w o m e n$ $b e a c q u i r e d i f n o t w o w o m e n a r e$ $t o b e a d j a c e n t t o e a c h o t h e r ?$ Answered by prakash jain last updated on…

Question-131828

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Question Number 131828 by Salman_Abir last updated on 09/Feb/21 Answered by liberty last updated on 09/Feb/21 $20 = \frac{6!}{3! . 3!}$ Commented by Salman_Abir last updated on…

Determine-the-following-sum-in-terms-of-n-S-n-i-1-n-i-2-q-i-1-where-0-lt-q-lt-1-For-the-distribution-of-the-discrete-random-variable-X-given-as-

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Question Number 683 by 112358 last updated on 24/Feb/15 $D e t e r m i n e t h e f o l l o w i n g s u m i n$ $t e r m s o f n .$ $S_{n} = \underset{i = 1}{\sum^{n}} i^{2} q^{i - 1}$ $w h e r e 0 < q < 1 .$ $F o r t h e d i s t r i b u t i o n o f t h e d i s c r e t e$ $${random}\:{variable}\:{X}\:{given}\:{as} \…

4e-x-6e-x-9e-x-4e-x-dx-

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Question Number 569 by userid1 last updated on 28/Jan/15 $\int \frac{4 e^{x} + 6 e^{- x}}{9 e^{x} - 4 e^{- x}} d x$ Terms of Service Privacy Policy Contact: info@tinkutara.com

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