11.Avery and Bradly work at a large electronic manufacturer that produces DVD players. The defective rate on the assembly line has gone up 12% and the manager wants to know the probability that a skid of 50 DVD players will contain at least 3 defective units. Help Avery use the binomial distribution P(x)=n Cx p^x q^n-x to answer this question

The probability that a skid of 50 DVD players will contain at least 3 defective units is 0.9487.

Step-by-step explanation:

We are given that Avery and Bradly work at a large electronics manufacturer that produces DVD players. The defective rate on the assembly line has gone up 12% and a skid of 50 DVD players has been selected by the manager.

Let X = Number of defective units of DVD players

The above situation can be represented through the binomial distribution;

where, n = number of samples (trials) taken = 50 DVD players

            r = number of success = at least 3 defective units

           p = probability of success which in our question is the probability

                 of defective rate, i.e; p = 12%

So, X ~ Binom(n = 50, p = 0.12)

Now, the probability that a skid of 50 DVD players will contain at least 3 defective units is given by = P(X 3)

P(X 3) = 1 - P(X = 0) - P(X = 1) - P(X = 2)

=

=

= 0.9487

Hence, the probability that a skid of 50 DVD players will contain at least 3 defective units is 0.9487.

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

b.-4 units

all you   do is count how many times you move