20 total.
How many primes? 2,3,5,7,11,13,17,19 = 8 so P(prime)=8/20
work the others the same way.
the number 1 to 20 are written on pieces of paper and put in the box. if a piece of paper is picked at random, what is the probability of picking a paper with: an odd number, a prime number, a multiple of 3 and a square numbe
1 answer
1 answer