[計量] 請教幾題計量
Given that a vending machine dispenses gumballs in a regularly repeating cycle of ten different colors. If a quarter buy 3 gumballs, what is the minium amount of money that must be spent before three gumballs of the same color are dispensed? ans: 5 dollars and 1 quarter
A measurement 1.21 is 1.5 standard variation below the mean and 1.75 is 3 standard variation over the mean , ask the mean? ans: 1.39
看不太懂這題在問甚麼?
Two names Johnson and Jones are given. If one letter is picked from both names simultaneously at random, what is the probability that the letters picked will be the same? ans: 6/35
在兩個禮拜就要上戰場了 麻煩幫忙解題了
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