A number is chosen at random from the first 100 positive integers. Find the probability that the number chosen is prime

Question

lgbasallote · Answer

i believe there are 49 prime numbers from 1-100?

so then wouldnt it be 49/100?

helder_edwin · Answer

do you know the number of prime numbers <100?
you can look for it in the web!

jamesj · Answer

49 sounds far too high.  Check that.

helder_edwin · Answer

once you find the number, say K, then the probability would be K/100

anonymous · Answer

There are 25 primes less than 100
{2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, \
67, 71, 73, 79, 83, 89, 97}
Prob= 1/4

jamesj · Answer

It's a good exercise ... and not that hard to figure it out yourself the number of primes

2 3 5 7
11 13 17 19
23 29
31 37
41 43 47
....

lgbasallote · Answer

oh wait lol i was mixing prime and odd *facepalm*