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प्रश्न
A number is selected from numbers 1 to 25. The probability that it is prime is
विकल्प
\[\frac{2}{3}\]
\[\frac{1}{6}\]
\[\frac{1}{3}\]
\[\frac{5}{6}\]
उत्तर
A number is selected from 1 to 25
TO FIND: Probability that, the number is a prime
Total number is 25
Numbers from 1 to 25 that are primes are 2, 3, 5, 7, 11, 13, 17, 19 and 23
Total numbers that are primes from 1 to 25 is 9
`"We know that PROBABILITY" = "Number of favourable event"/"Total number of event"`
Hence probability of getting a prime number from 1 to 25 is equal to `9/25`
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