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From 25 Identical Cards, Numbered 1, 2, 3, 4, 5, ……, 24, 25: One Card is Drawn at Random. Find the Probability that the Number on the Card Drawn is a Multiple Of: 3 and 5 - ICSE Class 10 - Mathematics

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Question

From 25 identical cards, numbered 1, 2, 3, 4, 5, ……, 24, 25: one card is drawn at random. Find the probability that the number on the card drawn is a multiple of:  

 3 and 5 

Solution

There are 25 careds from which one card is drawn 

Total number of elementary event =n(s)=25 

From numbers 1 to 25, there is only one number which is multiple of 3 and 5 i.e. {15}  favourable number of events = n(E)=1 

probabilty of selecting a card with a multiple of 3 and 5 =

`(n(E))/(n(S))=1/25`  

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Solution From 25 Identical Cards, Numbered 1, 2, 3, 4, 5, ……, 24, 25: One Card is Drawn at Random. Find the Probability that the Number on the Card Drawn is a Multiple Of: 3 and 5 Concept: Type of Event - Complementry.
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