20 numbers
primes
1, 3, 5, 7, 13, 17, 19 or 7 of those
squares
1 4 9 16 or 4 of them but 1 is repeated
so
7 + 3 = 10
10/20 = 1/2
A game consists of drawing a number from 1□20 a player wins if the number drawn is either a prime number or a perfect square what is the probability of winning this game
1 answer