An official from the securities commission estimates

An official from the securities commission estimates that 60% of all investment bankers have profited from the use of insider information. Assume that 20 investment bankers are selected at random from the commission's registry. What is the probability that more than 18 have profited from insider information?

a.            0.0005

b.            0.0036

c.             0.9964

d.            0.9995