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Thirty Identical Cards Are Marked with Numbers 1 to 30. If One Card is Drawn at Random, Find the Probability that It Is: A Multiple of 4 Or 6 - ICSE Class 10 - Mathematics

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Question

Thirty identical cards are marked with numbers 1 to 30. If one card is drawn at random, find the probability that it is: 

 a multiple of 4 or 6 

Solution

There are 30 cards from which one card is drawn. 

Total number of elementary events =n(s)=30  

From numbers 1 to 30, there are 10 numbers which are multiple of 4 or 6 i.e {4,6,8,12,16,18,20,24,28,30} Favourable number of event =10 

Probability os selecting a card with a multiple of  4 or 6 

`(n(E))/(n(s))=10/30=1/3 `

 

 

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Solution Thirty Identical Cards Are Marked with Numbers 1 to 30. If One Card is Drawn at Random, Find the Probability that It Is: A Multiple of 4 Or 6 Concept: Type of Event - Complementry.
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