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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: 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: 

 5

Solution

There are 25 cards from which one card is drawn. 

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

From number 1 to 25,  there are 5 number which are multiple of 5 i.e. [5,10,15,20,25] Favourable number of event = n(E)=5 

Probability of selecting cards with a multiple of 5= 

`(n(E))/(n(s))=5/25=1/5`

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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: 5 Concept: Type of Event - Complementry.
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