If \(r, s,\) and \(t\) are numbers, is \(r = 60?\)

[M7MBA]

If \(r, s,\) and \(t\) are numbers, is \(r = 60?\)

(1) The average (arithmetic mean) of \(r, s,\) and \(t\) is \(20.\)

(2) \(s = t = 0\)

Answer: C

Source: Princeton Review