Someone buys a pen for 1.09 and paper for 2.50 how much more does the paper cost more then the pen

1.41

Step-by-step explanation: subtraction

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 .