Question Number 182793 by cortano1 last updated on 14/Dec/22 $$\:{Suppose}\:{now}\:{that}\:{Allie}\:{is}\:{actually} \\ $$$$\mathrm{70}\:{years}\:{old},\:{and}\:{that}\:{her}\:{life}\:{expectancy} \\ $$$$\left({if}\:{cured}\right)\:{is}\:\mathrm{12}\:{years}\:{rather}\:{than} \\ $$$$\mathrm{20}\:.\:{Which}\:{procedure}\:{now}\:{has}\:{the} \\ $$$${greather}\:{expected}\:{value}\:?\:{What}\:{if}\:{her} \\ $$$${life}\:{expectancy}\:{is}\:\mathrm{8}\:{years}? \\ $$ Terms of Service…
Question Number 117192 by Lordose last updated on 10/Oct/20 $$\mathrm{Assuming}\:\mathrm{you}\:\mathrm{have}\:\mathrm{enough}\:\mathrm{coins}\: \\ $$$$\mathrm{of}\:\mathrm{1},\mathrm{5},\mathrm{10},\mathrm{25},\mathrm{and}\:\mathrm{50cents}.\:\mathrm{In}\:\mathrm{how} \\ $$$$\mathrm{many}\:\mathrm{ways}\:\mathrm{can}\:\mathrm{you}\:\mathrm{make}\:\mathrm{a}\:\mathrm{change}\:\mathrm{for}\:\mathrm{1dollar}. \\ $$ Answered by mr W last updated on 10/Oct/20 $${a}+\mathrm{5}{b}+\mathrm{10}{c}+\mathrm{25}{d}+\mathrm{50}{e}=\mathrm{100}…
Question Number 182695 by cortano1 last updated on 13/Dec/22 $$\:\:\mathrm{If}\:\mathrm{two}\:\mathrm{events}\:\mathrm{A}\:\mathrm{and}\:\mathrm{B}\:\mathrm{are}\:\mathrm{such}\: \\ $$$$\:\:\mathrm{that}\:\mathrm{P}\left(\mathrm{A}^{\mathrm{c}} \right)=\mathrm{0}.\mathrm{3}\:;\:\mathrm{P}\left(\mathrm{B}\right)=\mathrm{0}.\mathrm{4}\:\mathrm{and} \\ $$$$\:\:\mathrm{P}\left(\mathrm{A}\cap\mathrm{B}^{\mathrm{c}} \right)=\:\mathrm{0}.\mathrm{5}\:\mathrm{then}\:\mathrm{P}\left(\frac{\mathrm{B}}{\mathrm{A}\cup\mathrm{B}^{\mathrm{c}} }\right)=? \\ $$$$\:\left(\mathrm{A}\right)\:\mathrm{0}.\mathrm{20}\:\:\:\:\:\:\left(\mathrm{B}\right)\:\mathrm{0}.\mathrm{25}\:\:\:\:\:\:\left(\mathrm{C}\right)\:\mathrm{0}.\mathrm{30}\:\:\:\:\:\:\left(\mathrm{D}\right)\:\mathrm{0}.\mathrm{35} \\ $$$$\:\: \\ $$ Commented by…
Question Number 51465 by mr W last updated on 27/Dec/18 Commented by Rasheed.Sindhi last updated on 27/Dec/18 $${Sir}\:\mathrm{4}-{digit}\:{numbers}\:{I}\:{think}? \\ $$ Commented by mr W last…
Question Number 116881 by bemath last updated on 07/Oct/20 $$\mathrm{Find}\:\mathrm{the}\:\mathrm{number}\:\mathrm{m}\:\mathrm{of}\:\mathrm{non}\:\mathrm{negative} \\ $$$$\mathrm{integer}\:\mathrm{solution}\:\mathrm{of}\:\mathrm{x}+\mathrm{y}+\mathrm{z}=\mathrm{18} \\ $$$$ \\ $$ Answered by john santu last updated on 07/Oct/20 $${we}\:{can}\:{view}\:{each}\:{solution}\:,{say}\:{x}=\mathrm{3},\:{y}=\mathrm{7}\:,{z}=\mathrm{8}…
Question Number 116883 by bemath last updated on 07/Oct/20 $$\mathrm{Find}\:\mathrm{the}\:\mathrm{number}\:\mathrm{m}\:\mathrm{of}\:\mathrm{ways}\:\mathrm{to} \\ $$$$\mathrm{partition}\:\mathrm{10}\:\mathrm{students}\:\mathrm{into}\:\mathrm{four}\:\mathrm{team} \\ $$$$\mathrm{so}\:\mathrm{that}\:\mathrm{two}\:\mathrm{team}\:\mathrm{contains}\:\mathrm{3}\:\mathrm{students} \\ $$$$\mathrm{and}\:\mathrm{two}\:\mathrm{team}\:\mathrm{contains}\:\mathrm{2}\:\mathrm{students}\:. \\ $$ Answered by john santu last updated on…
Question Number 51286 by aseerimad last updated on 25/Dec/18 Answered by mr W last updated on 26/Dec/18 $${Type}\:\mathrm{1}: \\ $$$${Number}\:{of}\:{words}\:{starting}\:{with}\:{D}: \\ $$$$=\frac{\mathrm{7}!}{\mathrm{2}!}=\mathrm{2520} \\ $$$$ \\…
Question Number 51287 by aseerimad last updated on 25/Dec/18 Answered by mr W last updated on 26/Dec/18 $${let}'{s}\:{look}\:{at}\:{an}\:{example}: \\ $$$${the}\:{number}\:\mathrm{1234}\:{consists}\:{of}\:\mathrm{4}\:{digits}: \\ $$$$\mathrm{1}\:{represents}\:{here}\:{the}\:{value}\:\mathrm{1}×\mathrm{1000} \\ $$$$\mathrm{2}\:{represents}\:{here}\:{the}\:{value}\:\mathrm{2}×\mathrm{100} \\…
Question Number 181971 by Acem last updated on 03/Dec/22 $${How}\:{many}\:{words}\:{can}\:{be}\:{formed}\:{from}\:{different} \\ $$$${letters}\:{of}\:{the}\:“{Your}\:{answer}\:{is}\:{wrong}''\:{with}\:{not} \\ $$$${repeating}?\:{So}\:{that}\:{they}\:{shouldn}'{t}\:{start}\:{with}\:'{o}'\: \\ $$$$\:{neither}\:'{w}'\:{and}\:{shouldn}'{t}\:{end}\:{with}\:'{w}',\:{and} \\ $$$$\:{should}\:{be}'{r}'\:\&\:'{s}'\:{adjacents}. \\ $$$$ \\ $$$$\:\cancel{{O}ya}…{n},\:\cancel{{W}en}…{y},\:{Iog}…\cancel{{w}}\:,\:{You}\cancel{{r}w}\cancel{{s}}…{e}\:\::\:{are}\:{invalid} \\ $$$$\:{Enrsow}…{g}\::\:{is}\:{valid} \\…
Question Number 181939 by greougoury555 last updated on 02/Dec/22 $${If}\:\mathrm{10}\:{different}\:{balls}\:{are}\:{to}\:{be}\:{placed} \\ $$$${in}\:\mathrm{4}\:{boxes}\:{at}\:{random}\:,\:{then}\:{the}\:{probability} \\ $$$${that}\:{two}\:{of}\:{these}\:{boxes}\:{contain} \\ $$$${exactly}\:\mathrm{2}\:{and}\:\mathrm{3}\:{balls}\: \\ $$ Answered by Acem last updated on 02/Dec/22…