Question

The following is the frequency distribution with unknown frequencies
Class. 60-70 70-80 80-90 90-100
Frequency. a÷2 3a÷2. 2a. a. 50= total find the value of a hence find the frequencies draw a histogram and frequency polygon on the same

Answer 1

Answer:

Value of a =10

Step-by-step explanation:

class frequency

60-70 a÷2

70-80 3a÷2

80-90 2a

90-100 a

N = 50

Adding frequency

a÷2 + 3a÷2 +2a + a =50

4a÷2 +3a = 50

2a +3a = 50

5a = 50

a = 50÷5

a = 10

class frequency

60 -70 5

70- 80 15

80-90 20

90-100 10

N= 50

I help you please you can draw histogram and frequency polygon.

Because I have no time to draw.

Sorry for this.

it is very easy question.

Please Mark as Brainliest answer.