The likelihood of answering each question correctly stands at 1/4, given that there is 1 correct answer out of 4 choices. Therefore, the probability of answering 15 questions correctly is computed as (1/4)^15 = 1/1073741824.
The initial score was 80, and there was a wrongfully deducted 5 points. This indicates that any result equating to 85 is the correct outcome.
80 + 5 = 85
80 - (-5) = 85
The diagram below illustrates the normal distribution curve. The likelihood that his commuting time surpasses 61 minutes is represented by the area under the standard normal curve located to the right of X=61. To determine the z-score, we standardize X=61.
