Question

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

Answer 1

i believe there are 49 prime numbers from 1-100?

so then wouldnt it be 49/100?

Answer 2

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

Answer 3

49 sounds far too high. Check that.

Answer 4

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

Answer 5

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

Answer 6

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
....

Answer 7

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