A quiz consists of 90 multiple-choice questions, each with 4 possible answers (A, B, C and D). For someone who makes random guesses for all of the answers, find the probability of getting A as right answer. A is the correct answer for all the questions

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To find the probability of getting A as the right answer for all 90 questions, we need to determine the probability of selecting A as the correct answer for each question and then multiply these probabilities together.

Since each question has 4 possible answers (A, B, C, D), the probability of getting A as the right answer for each question is 1/4 or 0.25.

To find the probability of getting A as the right answer for all 90 questions, we multiply this probability 90 times:

Probability of getting A as the right answer for all 90 questions = (0.25)^90

To evaluate this probability, we can use a calculator or an appropriate software. The resulting probability is incredibly small, approaching zero.

Therefore, the probability of getting A as the right answer for all 90 questions by making random guesses is extremely low.