A={y|y=√x, x∈N, x≤100}A={y|y=√x, x∈N, x≤100}
x={0, 1, 2, ..., 99, 100}
=> A = {√0, √1, √2, √3, ......, √99, √100} => card(A)=101
a) rational => patrat perfect = {0(la 2), 1(la 2), .... 9(la 2), 10(la 2)}
=> p=11/101
b) irational => restul, inafara de cele 11=> 101-11 = 90
=> p=90/101
c)Real => toate sunt reale:
p=101/101=1