72% of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan. Find the probability that the number who consider themselves baseball fans is(a) exactlyeight, (b) at least eight, and(c) less than eight. Ifconvenient, use technology to find the probabilities.

I need help figuring out how to calculate (sub)n C_x specifically. My instructor was not able to help me...and the text has been worthless in describing how to calculate this.

The correct answer for (a) is 0.255, (b) .254794, and (c) 0.037439.

The probability that at least 8 consider themselves fans = 0.254794 + 0.145596 - 0.0347439 = 0.438