Asked by Hale

If a 20-sided fair die with sides distinctly numbered 1 through 20 is rolled, the probability that the answer is a perfect square can be expressed as a/b where a and b are coprime positive integers. What is the value of a+b?
Answered by Reiny
the only squares from 1 to 20 are
1 , 4, 9, 16, that would be 4 of them
So the prob(square) = 4/20 = 1/5

if 1/5 = a/b , in lowest terms, then
a+b = 1+5 = 6
Answered by Steve
4 perfect squares out of 20 possibilities

4/20 = 1/5, so 1+5 = 6
Answered by Anonymous
A fair icosahedral die(number 1-20) is rolled. What is the probability that it will show: a factor of 20 or a prime number?
There are no AI answers yet. The ability to request AI answers is coming soon!