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Category: Probability and Statistics

if-two-dice-are-tossed-together-what-is-probability-of-sim-of-number-on-the-dice-being-an-even-number-

Question Number 26255 by jashandhillon@gmail.com last updated on 23/Dec/17 iftwodicearetossedtogetherwhatisprobabilityofsimofnumberonthedicebeinganevennumber Commented by Rasheed.Sindhi last updated on 23/Dec/17 Sumoftwonumbersisevenif:eitherbothnumbersareeven$$\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{or}\:\mathrm{both}\:\mathrm{numbers}\:\mathrm{are}\:\mathrm{odd}. \

The-mean-weights-of-three-groups-of-students-consisting-of-16-18-and-20-students-are-40-5kg-42-50kg-and-45-00kg-respectively-What-is-the-mean-weight-of-all-the-students-

Question Number 25549 by pieroo last updated on 11/Dec/17 Themeanweightsofthreegroupsofstudentsconsistingof16,18and20studentsare40.5kg,42.50kgand45.00kgrespectively.Whatisthemeanweightofallthestudents? Answered by Rasheed.Sindhi last updated on 11/Dec/17…

A-bag-contains-5-balls-2-green-and-3red-They-are-selected-without-replacement-till-the-remaining-balls-in-the-bag-are-of-same-colours-Let-the-random-variable-X-be-the-number-of-selections-possible-1

Question Number 90196 by Ar Brandon last updated on 21/Apr/20 Abagcontains5balls,2greenand3redTheyareselectedwithoutreplacementtilltheremainingballsinthebagareofsamecolours.LettherandomvariableXbethenumberofselectionspossible1)DeterminethesetofvaluesofX2)Determinetheitsexpectation,itsvariance$$\mathrm{and}\:\mathrm{its}\:\mathrm{standard}\:\mathrm{deviation}.…

I-hold-my-hand-behind-my-back-and-secretly-hold-up-n-fingers-0-n-5-I-then-as-you-am-I-holding-up-k-fingers-Where-k-is-also-a-random-number-0-k-5-You-randomly-guess-Yes-or-No-What-is-the-pr

Question Number 24490 by FilupES last updated on 19/Nov/17 Iholdmyhandbehindmyback,andsecretlyholdupnfingers(0n5).Ithenasyou,amIholdingupkfingers?Wherekisalsoarandomnumber0k5.YourandomlyguessYesorNo.$$\mathrm{What}\:\mathrm{is}\:\mathrm{the}\:\mathrm{probability}\:\mathrm{you}\:\mathrm{guess}\:\mathrm{correctly}? \

In-a-classroom-when-the-students-sit-2-per-bench-11-students-are-left-with-no-sits-And-when-they-sit-3-per-bench-7-benches-are-left-empty-Determine-the-number-of-students-in-this-classroom-

Question Number 89898 by Ar Brandon last updated on 19/Apr/20 Inaclassroomwhenthestudentssit2perbench,11studentsareleftwithnosits.Andwhentheysit3perbench7benchesareleftempty.Determinethenumberofstudentsinthisclassroom. Commented by MJS last…