Question Number 3824 by Yozzii last updated on 21/Dec/15 $${Box}\:{I}\:{has}\:\mathrm{3}\:{red}\:{and}\:\mathrm{5}\:{white}\:{balls}, \\ $$$${while}\:{Box}\:{II}\:{contains}\:\mathrm{4}\:{red}\:{and}\:\mathrm{2}\: \\ $$$${white}\:{balls}.\:{A}\:{ball}\:{is}\:{chosen}\:{at}\:{random} \\ $$$${from}\:{the}\:{first}\:{box}\:{and}\:{placed}\:{in}\:{the} \\ $$$${second}\:{box}\:{without}\:{observing}\:{its}\:{colour}. \\ $$$${Then}\:{a}\:{ball}\:{is}\:{drawn}\:{from}\:{the}\:{second} \\ $$$${box}.\:{Find}\:{the}\:{probability}\:{that}\:{it}\:{is}\:{white}. \\ $$ Commented…
Question Number 134622 by bobhans last updated on 05/Mar/21 $$\mathrm{Probability} \\ $$Initially there are 4 red balls and 3 yellow balls in a bag, however…
Question Number 134623 by bobhans last updated on 05/Mar/21 $$\mathscr{PR}\mathrm{obability} \\ $$An urn contains 3 red balls, 2 green balls and 1 yellow ball. Three…
Question Number 134498 by bemath last updated on 04/Mar/21 $$ \\ $$Consider a 12-letter word made up of 8 b’s and 4 a’s. what is…
Question Number 134472 by EDWIN88 last updated on 04/Mar/21 $$ \\ $$Badu took a test consisting of 3 multiple choice questions with 4 answer choices…
Question Number 134296 by EDWIN88 last updated on 02/Mar/21 Answered by bramlexs22 last updated on 02/Mar/21 $$\mathrm{total}\:\mathrm{three}\:\mathrm{digit}\:\mathrm{numbers}\:=\:\mathrm{4}×\mathrm{5}^{\mathrm{2}} =\mathrm{100} \\ $$$$\mathrm{the}\:\mathrm{number}\:\mathrm{has}\:\mathrm{identical}\:\mathrm{digit}? \\ $$$$\left[\:\mathrm{111},\:\mathrm{333},\:\mathrm{555},\:\mathrm{999}\:\right]\:=\:\mathrm{4}\:\mathrm{numbers} \\ $$$$\mathrm{the}\:\mathrm{p}\left(\mathrm{A}\right)=\:\frac{\mathrm{4}}{\mathrm{100}}\:=\:\frac{\mathrm{1}}{\mathrm{25}} \\…
Question Number 134168 by liberty last updated on 28/Feb/21 $$ \\ $$Suppose there are 50 full-time teachers and each teacher requires 5 classes to make…
Question Number 3023 by Rasheed Soomro last updated on 03/Dec/15 $$\mathrm{Pl}\:\mathrm{notice}\:\mathrm{the}\:\mathrm{answer}\:\mathrm{of}\:\underset{−} {\mathrm{Q2771}},\mathrm{I}\:\mathrm{have}\:\mathrm{updated}\:\mathrm{it}. \\ $$ Answered by prakash jain last updated on 04/Dec/15 $$\mathrm{I}\:\mathrm{think}\:\mathrm{the}\:\mathrm{answer}\:\mathrm{should}\:\mathrm{be} \\ $$$$\frac{\mathrm{number}\:\mathrm{of}\:\mathrm{rectangles}\:\mathrm{in}\:\mathrm{7}×\mathrm{7}\:\mathrm{grid}\:\left(\mathrm{8}×\mathrm{8}\:\mathrm{points}\right)}{\mathrm{number}\:\mathrm{of}\:\mathrm{ways}\:\mathrm{to}\:\mathrm{select}\:\mathrm{4}\:\mathrm{points}=^{\mathrm{64}}…
Question Number 2771 by prakash jain last updated on 26/Nov/15 $$\mathrm{64}\:\mathrm{points}\:\mathrm{are}\:\mathrm{in}\:\mathrm{a}\:\mathrm{plane}: \\ $$$$\left({x},{y}\right),\:{x}\in\left\{\mathrm{0},\mathrm{1},\mathrm{2},…,\mathrm{7}\right\},\:{y}\in\left\{\mathrm{0},\mathrm{1},\mathrm{2},…,\mathrm{7}\right\} \\ $$$$\mathrm{4}\:\mathrm{points}\:\mathrm{are}\:\mathrm{chosen}\:\mathrm{at}\:\mathrm{random}. \\ $$$$\mathrm{What}\:\mathrm{is}\:\mathrm{the}\:\mathrm{proabability}\:\mathrm{the}\:\mathrm{lines}\:\mathrm{connecting} \\ $$$$\mathrm{them}\:\mathrm{do}\:\mathrm{not}\:\mathrm{form}\:\mathrm{a}\:\mathrm{square}\:\mathrm{or}\:\mathrm{rectangle}? \\ $$ Answered by Rasheed Soomro…
Question Number 133821 by bramlexs22 last updated on 24/Feb/21 $$\mathrm{There}\:\mathrm{are}\:\mathrm{5}\:\mathrm{positive}\:\mathrm{numbers}\: \\ $$$$\mathrm{and}\:\mathrm{6}\:\mathrm{negative}\:\mathrm{numbers}.\:\mathrm{Three}\: \\ $$$$\mathrm{numbers}\:\mathrm{are}\:\mathrm{chosen}\:\mathrm{at}\:\mathrm{random} \\ $$$$\mathrm{and}\:\mathrm{multiplied}\:.\:\mathrm{The}\:\mathrm{probability} \\ $$$$\mathrm{that}\:\mathrm{the}\:\mathrm{product}\:\mathrm{being}\:\mathrm{a}\:\mathrm{negative} \\ $$$$\mathrm{number}\:\mathrm{is}\: \\ $$$$\left(\mathrm{a}\right)\:\frac{\mathrm{17}}{\mathrm{33}}\:\:\:\left(\mathrm{b}\right)\:\frac{\mathrm{11}}{\mathrm{34}}\:\left(\mathrm{c}\right)\:\frac{\mathrm{16}}{\mathrm{33}}\:\:\:\left(\mathrm{d}\right)\:\frac{\mathrm{16}}{\mathrm{35}} \\ $$ Answered…