Amanufacturer is testing 4 brands of soda in a blind taste test. the participants know the brands being tested but do not know which is which. what is the probability that a participant will identify all 4 brands correctly by guessing?

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

What is the value of x? enter your answer in the box. x =