A gene can be either type A or type B, and it can be either dominant or recessive. If the gene is type B, then there is a probability of 0.31 that it is dominant. There is also a probability of 0.22 that a gene is type B and it is dominant.
What is the probability that a gene is of type A?

The probability that a gene is of type A is 0.29.

Step-by-step explanation:

Let A be the event of type A.

Let B be the event of type B.

Let D be the event of dominant.

So, P(B and D) = 0.22

P(D|B)=0.31

So, Using the conditional probability, we get that

So, the probability that a gene is of type A is given by

Hence, the probability that a gene is of type A is 0.29.

The probability that a gene is of type A is 0.29 .

Step-by-step explanation:

We are given that a gene can be either type A or type B, and it can be either dominant or recessive.

Let event A = gene having type A

     event B = gene having type B

     event D = gene is dominant

     event R = gene is recessive

We are given that if the gene is type B, then there is a probability of 0.31 that it is dominant i.e. P(D/B) = 0.31

Also, there is a probability of 0.22 that a gene is type B and it is dominant i.e. P(B D) = 0.22

Now, the conditional probability of P(D/B) is given by;

                  ⇒   P(D/B) =  

                  ⇒  0.31 =   ⇒ P(B) = 0.22 ÷ 0.31 = 0.71

So, now Probability that a gene is of type A, P(A) = 1 - P(B) {because only gene of type A or type B is possible}

            = 1 - 0.71 = 0.29 .

Hence, the probability that a gene is of type A is 0.29 .

the answer is c. 23/3

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98