How many ways can the number 10 be written as the sum of exactly three positives and not necessarily different integers if the order in which the sum is written does not matter? For instance,
10 = 1 + 4 + 5 is one such sum. This sum is the same as 10 = 4 + 1 + 5.

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?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0