The Grass Doctor

How to solve these probability problems? what formula is needed?

1. A certain brand of grass seed has an 86 percent probability of germination. If a lawn care specialist plants 9000 seeds, find the number that should germinate. 2. In the game of craps using two dice, a person wins the first roll if a 7 or 11 is rolled. Find the probability of winning the first roll. 3. When 350 students were interviewed, 186 stated that they preferred the lecture presentation to a group discussion. Find the probability that if a student were randomly selected, he or she would prefer the lecture presentation. 4. A flashlight has 6 batteries, two of which are defective, If two of which are selected at random without replacement, find the probability that both are defective. 5. A Automobile saleswoman finds that the probability of making a sale of 0.23. IF she talks to four customers today, find the probability that she will sell four cars. Kindly show solutions

Public Comments

1. 1)86/100(3000) 2)total 36 comb. prob 8/36 3)186/350 4)1/6c2 50)0.23*0.23*0.23*0.23