Question

A​ person's blood type is denoted with the letters​ A, B, and​ O, and the symbols​ + and - . The blood type​ A+ is read as A positive. The blood type B - is read as B negative. Use the data to write a ratio for the comparison in 3 different ways.

Answer 1

Answer:

(a) O+ to A+

$O+:A+=90:45$

$O+:A+=18:9$

$O+:A+=2:1$

(b) AB- : AB+

$AB-:AB+ = 6:4$

$AB-:AB+ = 3:2$

$AB-:AB+ = 12:8$

(c): B+ to total

$B+ : Total = 20 : 195$

$B+ : Total = 4 : 39$

$B+ : Total = 40 : 390$

Step-by-step explanation:

Given

$A+ = 45$       $B+ = 20$        $AB+ =6$        $O+=90$

$A-=21$       $B-=0$          $AB-=4$          $O-=9$

$Total = 195$

See attachment

Required

Solving (a): O+ to A+

We have:

$A+ = 45$

$O+=90$

So, the ratio is:

$O+:A+=90:45$ ---- first comparison

Divide by 5

$O+:A+=90/5:45/5$

$O+:A+=18:9$ ---- Second comparison

Divide by 45

$O+:A+=90/45:45/45$

$O+:A+=2:1$ ---- Third comparison

Solving (b): AB- to AB+

We have:

$AB+ =6$

$AB-=4$

So, the ratio is:

$AB-:AB+ = 6:4$ ---- first comparison

Divide by 2

$AB-:AB+ = 6/2:4/2$

$AB-:AB+ = 3:2$ ---- Second comparison

Multiply by 2

$AB-:AB+ = 6*2:4*2$

$AB-:AB+ = 12:8$ ---- Third comparison

Solving (c): B+ to total

We have:

$B+ = 20$

$Total = 195$

So, the ratio is:

$B+ : Total = 20 : 195$ ---- first comparison

Divide by 5

$B+ : Total = 20/5 : 195/5$

$B+ : Total = 4 : 39$ ---- Second comparison

Multiply by 2

$B+ : Total = 20*2 : 195*2$

$B+ : Total = 40 : 390$ ---- Third comparison