Question

the pie diagram shows percentage of persons according to blood group. answer the question
1.find the measure of central angle for each blood group.
2.find the number of persons if there are 600 persons of blood group B​

Answer 1

Step-by-step explanation:

1.

Blood Group    Percentage    Measure of Central angle

O                              45               (45÷ 100) *  360 = 162

A                              20               (20÷ 100)× 360 = 72

B                              30                (30÷ 100)× 360 = 108

AB                            5                  (5÷ 100)× 360 = 180

Total                        100                     360°

2.

Number of persons in blood group 'B' :

= (30÷100) * Total Number of persons.

∴ 600 = (3/10) *  Total Number of Persons.

∴ Total number of Persons = 6000/3

∴ Total number of Persons = 2000 Persons.

Total numbers of persons are 2000.

Hope it helps!