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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: Greater than 85 - 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: 

 greater than 85

Solution

There are 100 cards from which one card is drawn. 

Total number of elementary event =n(s0=100 

From numbers 1 to 100 there are 15 numbers which are greater than 85 i.e {86,87,.......98,99,100} favorable number of event =n(E) =15 

Probabilty of selecting card with a number greater than 85= 

`(n(E))/(n(s))-15/100-3/20`  

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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: Greater than 85 Concept: Type of Event - Complementry.
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