Question

Find missing value if mean is 25. CI F
0-10. 3
10-20. x
20-30. 10
30-40. 7
40-50. y

It's also given that sum of frequesncies is 30.

USE ASSUMED MEAN METHOD ONLY​

Answer 1

Answer:

1. 0 -10. 3

Ans. here 3 is wrong ans. right ans. is -10

2. 10 -20. x

x = -10

3. 20-30. 10

Ans. here 10 is wrong ans. right ans. is -10

4. 30-40. 7

Ans. here 7 is wrong ans. right ans. is -10

5. 40-50. y

Ans. y= -10