The probability that is would be correct is , just let us use fractions which is . Now each 5 should be correct thus,Originally Posted bybatman123

.

For the second part you need to use the formula:

to determine the probability of something exactly happening out of a certain amount of times.

Over here you need it to be zero times exactly OR one time exactly of getting a defect. Zero times is the same as all 5 where non-defective which is the same as in the first problem is 33%. To determine of getting exactly one defect use . Thus, the overall probability is the sum which is approximately 73%.

This is my 5th post!!