Human blood may contain either or both of two antigens, a and b. blood that contains only the a antigen is called type a, blood that contains only the b antigen is called type b, blood that contains both antigens is called type ab, and blood that contains neither antigen is called type o. at a certain blood bank, 35% of the blood donors have type a blood, 10% have type b, and 5% have type ab.
round the answers to two decimal places
(a) what is the probability that a randomly chosen blood donor is type o?
(b) a recipient with type a blood may safely receive blood from a donor whose blood does not contain the b antigen. what is the probability that a randomly chosen blood donor may donate to a recipient with type a blood?
(c) if someone has the a antigen, what is the probability that they are type ab?

Intersecting secant-tangent theorem states that if a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment.so to break it down: 1. pq acts as the tangent and ps as the secant with an intersection at p.sr = 21rp = 3x + 3pq = 4x + 4following to equation: tangent squared = the two segments multiplied by each otherso (4x + 4) ^ 2 = (3x + 3) • (21) simplifies to 16x^2 - 31x - 47 = 0 or (16x - 47)(x + 1) x = -1 or x = 47/162. pq acts as the tangent and ps as the secant with an intersection at p (again! )sr = 16rp = xpq = 15(15) ^ 2 = 16 • x225 = 16xx = 225/163. the interesting chords are proportional to each other so a ratio is possible to set up: ap dp 10 3 + x = = —— = pc pb 8 xcross multiple to get 10x = (3 + x)(8)x = 12

Ithink you’re answering is b