In a clinical study, volunteers are tested for a gene that has been found to increase the risk for a disease. the probability that a person carries the gene is 0.1. people are assumed to be independent with respect to the gene. a. what is the probability that exactly four people need to be tested to detect two with the gene? b. what is the probability that four or more people need to be tested to detect two with the gene? c. what is the expected number of people to test to detect two with the gene?

answer: y=0 if that is what u r looking for

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!