Three families each buy the same number of $10 tickets per person to the zoo. Each family also pays $2 for parking. The total cost is $126. Write an equation that can be used to find n, the number of people in a family.
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You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?