If the variance of a dataset is 0 then all entries in the dataset must equal 0 true or false

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Find the area of an equilateral triangle with a side of 6 inches