Decide whether an experiment has a binomial model

For each experiment, determine whether X is binomial and state its parameters where appropriate.

(a) Draw a bead ten times without replacement from a jar containing 15 red and 25 blue beads; X counts red beads obtained.

(b) Repeat with the same 15 red and 25 blue beads, but with replacement on every draw.

(c) Randomly answer 20 true/false questions; X counts correct answers.

(d) Randomly answer 20 multiple-choice questions, some with four choices and the rest with five; X counts correct answers.