Amultiple-choice examination consists of 90 questions, each having possible choices a, b, c, d, and e. approximate the probability that a student will get fewer than 15 answers correct if she randomly guesses at each answer. (note that, if she randomly guesses at each answer, then the probability that she gets any one answer correct is0.2 .) use the normal approximation to the binomial with a correction for continuity

Carla was trying to decide what to do saturday evening. she has $100 available to spend for the evening. she has narrowed her choices down to these events: braves game, a concert of an artist she likes, or the georgia aquarium. admission to the braves game is $25, hot dogs cost $10, sodas cost $5. the concert costs $25 for admission, $20 for a souvernir t-shirt, and $10 for a soda. the georgia aquarium has the show of a lifetime with an all you can eat and drink that costs $100. carla does not want to take any driving chances, so in addition to the cost of the aquarium, she will also need to pay for her uber/lyft, which is $15 each way. which option should carla choose if she wants to spend the least? based on that choice, what then is carla's oppotunity cost? fully explain your answer in at least one paragraph.