Heart of Algebra SAT Problems!
How many integers between 0 and 999 contain a single digit that is a 7? The probability of scoring 90 or above is .35 in a group of 11 students, find the probability that 10 or 11 score a 90 or above? In a bag there are 6 blue marbles, 4 red marbles, 7 yellow marbles,[…]