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प्रश्न
A number is selected from first 50 natural numbers. What is the probability that it is a multiple of 3 or 5?
विकल्प
\[\frac{13}{25}\]
\[\frac{21}{50}\]
\[\frac{12}{25}\]
\[\frac{23}{50}\]
उत्तर
A number is selected from 50 natural numbers
TO FIND: Probability that the number selected is a multiple of 3 or 5
Total number is 50
Total numbers which are multiple of 3 or 5 up to 50 natural numbers are
3,6,5,9,10,12,15,18,20,21,24,25,27,30,33,35,36,39,40,42,45,48,50
Total number which are multiple of 3 or 5 up to 50 natural numbers are23
`"We know that PROBABILITY" = "Number of favourable event" /"Total number of event"`
Hence probability that the number selected is a multiple of 3 or 5 is equal to`23/50`
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