Learn
QUESTION
Q
If a 4 digit number is formed with digits 1, 2, 3 and 5. What is the probability that the number is divisible by 25, if...
If a 4 digit number is formed with digits 1, 2, 3 and 5. What is the probability that the number is divisible by 25, if repetition of digits is not allowed ?
A
B
C
D
E
A
B
C
D
E
Solution
The total number of four digit numbers that can be formed = 4!
If the number is divisible by 25,...
The total number of four digit numbers that can be formed = 4!
If the number is divisible by 25, then the last two digits of the number must be 25.
So the first two digits can be arranged in 2! ways.
Hence, probability
= =
Register & Unlock access to Prep for free
Solution
.hez-title-solution{display: none;}
Keynote
#hez-keynote-title{display: none;}
0
Probability questions available for your Free Practice
0
Quantitative Ability questions available for your Free Practice
Environment & BiodiversityFunctionsBar GraphsLine GraphsPermutations & CombinationsGATESentence ImprovementImportant DaysMathematical InequalitiesFill in the BlanksSymbols & NotationsSimple & Compound InterestComputer KnowledgeMarketingScience & TechnologyQuantitative AbilityGeneral AwarenessData ProblemsAnalogiesVerbal ReasoningDirectionsPolityInput - OutputPie ChartParajumblesLogical ReasoningOrder arrangementArrangements & RearrangementsIBPSXATData Sufficiency - LRSeriesCATPercentagesPlacement TestsCaselet DIWord BuildingSpeed, Time & DistanceSyllogismsTCSAuthors & BooksAPPSCGRECurrent Affairs 2015Ratio & ProportionClocks & CalendarsQuadratic RelationsCMATArithmetic OperationsCoding & DecodingExpansionsLICTaglinesIIFTTime & WorkData InterpretationSSCMensurationVerbal AbilitySet TheoryUPSCNumber SeriesGMATCloze TestNMATInequalitiesPassagesRBIGeometryVocabularyProfit and LossLogarithmsMiscellaneous - LRSpot the ErrorBlood RelationsQuadratic EquationsCoordinate GeometryAlgebraGeneralProbabilityProgressions & SeriesComputersCircular ArrangementMixtures and AllegationsNumbersTrigonometryMiscellaneous - GASimple EquationsMiscellaneous - VAMATMiscellaneous - QANumber SystemTabular DataAveragesSBI
Practice
0
questions for Free