Among the natural numbers not
greater than 22 , the probability that
the modulus of the difference of any
two of the 3 randomly selected numbers
is greater than 5 is equal to which of
the following?
a)15/22 b)1/7 c)1/22 d)1
6 of the 23 given points in the plane
lie on a circle. Let n be the number of
circles passing through at least 3 of
these points. What is the maximum
number of n?