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Nine Cards (Identical in All Respects) Are Numbered 2 to 10. a Card is Selected from Them at Random. Find the Probability that the Card Selected Will Be: An Even Number Or a Multiple of 3 - ICSE Class 10 - Mathematics

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Question

Nine cards (identical in all respects) are numbered 2 to 10. A card is selected from them at random. Find the probability that the card selected will be:  

 an even number or a multiple of 3 

Solution

There are 9 cards from which one card is drawn. 

Total number of elementry events = n(E)=9 

From numbers 2 to 10, there are 7 numbers which are even numbers or a multiple of 3 i.e. 2, 3, 4, 6, 8, 9, 10
Favorable number of events = n(E) = 7 

Probability of selecting a card with a number which is an even number or a multiple of 3 = 

`(n(E))/(n(s))=7/9` 

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Solution Nine Cards (Identical in All Respects) Are Numbered 2 to 10. a Card is Selected from Them at Random. Find the Probability that the Card Selected Will Be: An Even Number Or a Multiple of 3 Concept: Type of Event - Complementry.
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