Which of the following is a valid probability distribution?

Giving free brainliest + free points if answered correctly ! rural areas have of development. a. heavy signs b. no signs c. one type d. different types

98 points! include an answer and in advance!

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii