Question

In a survey done on cars parked near various blocks are given below:
20, 12, 20, 16, 13, 15, 20, 25, 30, 20. Find the Mean, Mode and Median

Answer 1

Step-by-step explanation:

Marks Mid−value

xi No.offrequency

fi c.f fixi 0−10 5 1 1 5 10−20 15 4 5 60 20−30 25 5 10 125 30−40 35 8 18 280 40−50 45 2 20 90   ∑fi=20  ∑fixi=560 ⇒  Mean(x)=∑fi∑fixi=20560=28

⇒  Modal class =30−40

So, l=30,f0

Answer 2

Answer:

Step-by-step explanation:

Marks Mid−value

xi No.offrequency

fi c.f fixi 0−10 5 1 1 5 10−20 15 4 5 60 20−30 25 5 10 125 30−40 35 8 18 280 40−50 45 2 20 90   ∑fi=20  ∑fixi=560 ⇒  Mean(x)=∑fi∑fixi=20560=28

⇒  Modal class =30−40

So, l=30,f0