find out the missing frequency of the the following series if the A.M is 35 and total no.of items is 100 class interval :0-10,10-20,20-30,30-40,40-50,50-60,60-70. frequency: 5,10,?,4,20,3,?,.
Answers
Given : A.M is 35 and total no.of items is 100
class interval :0-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70.
frequency: 5, 10, ?, 4, 20, 3, ?,.
To Find : missing frequency
Step-by-step explanation:
class interval : Mean A=(Mean -35)/10 f Af
0-10, 5 -3 5 -15
10-20, 15 -2 10 -20
20-30, 25 -1 x -x
30-40, 35 0 4 0
40-50, 45 1 20 20
50-60, 55 2 3 6
60-70. 65 3 y 3y
42 + x + y 3y -x - 9
AM = 35
Assumed Mean = 35
Hence 3y -x - 9 = 0
=> 3y - x = 9
42 + x + y = 100
=> x + y = 58
=> 4y = 67
=> y = 67/4 = 16.75
x = 41.25
missing frequencies 41.25 and 16.75
Learn More:
AM is 29 .find the missing frequency .x-5,15,25,35,45,55,f-5,7
https://brainly.in/question/24128502
AM is 29 .find the missing frequency .x-5,15,25,35,45,55,f-5,7
https://brainly.in/question/24128533