Question

Find the value d if ∑ FiDi = 1885 and ∑ Fi = 100 ​

Answer 1

Answer:

The value of d is 18.85

Step-by-step explanation:

given

∑fiDi = 1885

∑fi= 100

to find the value of d we use  the devaition formula

d = ∑fidi/ ∑fi

putting the values

d= $\frac{1885}{100}$

d= 18.85

The value of d is 18.85

Answer 2

Answer:

igi787ff77h8ufyd7d7d7d7tThe time required for some students to complete a science experiment

and the number of students is shown in the following grouped frequency

distribution table. Draw the frequency polygon with the help of

histogtum using given information:

Time required

Number of

for experiment

Students

(minutes)

20 - 22

22 - 24

14

24 - 26

20

26-28

16

28 - 30

12

30 - 32

10

6