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Cards marked with numbers 1, 2, 3 ......... 20 are well shuffled and a card is drawn at random. What is the probability that the number on the card is divisible by 3? - Mathematics

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प्रश्न

Cards marked with numbers 1, 2, 3 ......... 20 are well shuffled and a card is drawn at random. What is the probability that the number on the card is divisible by 3? 

योग
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उत्तर

Total possible outcomes = 20 

Favorable outcomes for a number divisible by 3 = 3, 6, 9, 12, 15, 18 

Number of favorable outcomes = 6 

P(divisible by 3) = `6/20 = 3/10`

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