Determine whether the distributions described below are bino

Determine whether the distributions described below are binomial, geometric, or neither. Justify your choice.
1. You record the gender of the next 100 babies at a local hospital. The random variable, x, represent the number of girls.
2. You take a survey of 100 college students to decide what genre of music the upstanding young minds of our schools enjoy. The random variable,x, represents the number of the first student to select Rock.
3. A pain reliever had been shown to have a 90% rate of effectiveness. A researcher randomly selects 20 patients who use the pain reliever. The random variable, x, represents the number of patients who report that the pain reliever is effective.

Solution

(1)binomial

(2)geometric

(3)binomial