Probability : Multiple-Choice Test

Q1. A student takes a multiplechoice test in which there are five choices for each question. Find the probability that the first question is answered correctly given the following conditions.
(a) The student has no idea of the answer and guesses at random.
(b) The student can eliminate two of the choices and guesses from the remaining choices.
(c) The student knows the answer.

Q2. A student takes a multiplechoice test in which there are four choices for each question. Find the probability that the first question is answered correctly given the following conditions.
(a) The student has no idea of the answer and guesses at random.
(b) The student can eliminate two of the choices and guesses from the remaining choices.
(c) The student knows the answer.

ANSWERS..!

Sugandha Chatterjee

Q1. A student takes a multiplechoice test in which there are five choices for each question. Find the probability that the first question is answered correctly given the following conditions.

(a) The student has no idea of the answer and guesses at random.
ANS : 1/5

(b) The student can eliminate two of the choices and guesses from the remaining choices.
ANS : 1/3

(c) The student knows the answer.
ANS : 1

Q2. A student takes a multiplechoice test in which there are four choices for each question. Find the probability that the first question is answered correctly given the following conditions.

(a) The student has no idea of the answer and guesses at random.
ANS : 1/4

(b) The student can eliminate two of the choices and guesses from the remaining choices.
ANS : 1/2

(c) The student knows the answer.
ANS : 1

OH BOY! ONLY IF CAT WAS THIS SIMPLE...!!!

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