Recent content by Dommm

Homework Statement Question: Find the number of trials needed to be 90% sure of at least three or more success, given that probability of one success is 0.2 Homework Equations N/A The Attempt at a Solution My initial attempt at the problem was finding the probability of at least...

doh! I see. Thank you :) How about the notation? Is the way that I represented the answers correct?

Homework Statement Three tests are available to identify six different substances. Test 1 is true in the presence of substance 1,2,3, and 4 Test 2 is true in the presence of substance 3,4, and 5 Test 3 is true in the presence of substance 2,5, and 6 Using set notation to denote the...