Each letter of the words DEPARTMENT is written on a separate card. The cards are placed face
down and mixed up. What is the probability that a randomly selected card is a vowel? (Round your
answer to 1 decimal place).

You didn’t put the necessary image to solve the question : p

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .