A bag contains red and blue marbles, such that the probability of drawing a blue marble is 3. An experiment consists of drawing a marble, replacing it, and drawing another marble. The two draws are independent. A random variable
assigns the number of blue marbles to each outcome.
Complete the probability distribution table on your own paper. Answer the question in the text box below.
Probability Distribution
Number of blue
0
1
2
Probability
What is the probability of drawing exactly one blue marble? Write a simplified fraction

Ageologist is working in an area with exposed sedimentary rocks and finds a well exposed sequence of stratified rocks. as he works through a thick sequence of limestone, he sees abundant large clam fossils that produce an interlocking texture suggesting a reef, but within the limestone section these clams disappear and the overlying limestone is made up primarily of fragments of corals. he now moves 50 km away and finds limestones interbedded with shales, and the limestones contain the same clam fossils he had seen previously 50 km away. as he continues through this section, the rocks become entirely limestone, and the clams disappear again with coral fossils above forming a reef structure. he concludes