Please Help (Multiple answer choice) 1. A’(5,-1), B’(4,-5), C’(2,-3) 2. A’(5,1), B’ (4,5), C’(2,3) 3. A’(5,1), B’(4,5), C’(2,3) 4. A’(-5,1), B’(-4,5), C’(-2,3). Please help those are the answer choices

The expected value of the random variable X is 2.678.

Step-by-step explanation:

We are given that according to the American red cross, 10.3% of all Connecticut residents have type B blood.

Also, a random sample of 26 Connecticut residents is taken.

Let X = the number of CT residents that have Type B blood

The above situation can be represented through binomial distribution;

where, n = number of trials (samples) taken = 26 residents

            r = number of success

            p = probability of success which in our question is % of all  

                  Connecticut residents who have type B blood, i.e; 10.3%.

So, X ~ Binom(n = 26, p = 0.103)

Now, the expected value of the random variable X is given by;

        E(X)  =  

                 =    = 2.678