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Hundred Identical Cards Are Numbered from 1 to 100. the Cards the Cards Are Well Shuffled and Then a Card is Drawn. Find the Probability that the Number on Card Drawn Is: a Multiple of 5 - ICSE Class 10 - Mathematics

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Question

Hundred identical cards are numbered from 1 to 100. The cards The cards are well shuffled and then a card is drawn. Find the probability that the number on card drawn is: 

a multiple of 5 

Solution

There are 100 cards from which one card is drawn. 

Total number of elementary events - n(s)-100 

From numbers 1 to 100, threr are 20 numbers which are multiple of i.e {5,10,15,20,25,30,,35,40,45,50,55,60,65,70,75,80,85,90,95,100}  favorable number of event =n(E)=20 

Probability of selecting card with a multiple of 5 = 

`(n(E))/(n(s))-20/100-1/5` 

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Solution Hundred Identical Cards Are Numbered from 1 to 100. the Cards the Cards Are Well Shuffled and Then a Card is Drawn. Find the Probability that the Number on Card Drawn Is: a Multiple of 5 Concept: Type of Event - Complementry.
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