Cho 2021 điểm phân biệt và không thẳng hàng. Hỏi có tất cả bao nhiêu vecto có điểm đầu và cuối không trùng nhau được lập từ các điểm đã cho? chọn đáp án:

A) 4082420

B) 4042

C) 4080400

D) 4084441

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

How many doughnuts are equal to 20 cookies.? 3 apples = 5 bananas6 cookies = 7 apples2 doughnuts = 1 banana

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed