Abag holds 1 blue block and 3 yellow blocks. how many green blocks should be added to the bag to make the probability of randomly selecting a green block from the bag equal to 1/2 ?

Ten times the square of a non-zero number is eqaul to ninety times the number

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

Which diagram shows lines that must be parallel lines cut by transversal?