if you ask one student three questions yes or no answers what is the probability model for this

Question

1-student  3-questions student guess at answers anylyse the pattern of correct and incorrect

Answer 1

8 possibles: YYY, YYN, YNY, YNN, NYY, NYN, NNY, NNN.

Probability is binomial (only 2 possible answers). Chances of correctness:

All correct: 1/8; only 1 correct: 3/8; only 2 correct: 3/8; none correct: 1/8

At least 1 correct: 1-1/8=7/8;

At least 2 correct: 4/8=1/2;

At most 1 correct: 4/8=1/2;

At most 2 correct: 7/8.