Question

4.The mean of the following frequency distribution is 24.Find the value of P
Class
0-10
10-20
20-30
30-40
40-50
frequency 15
20
35
P.
10​

Answer 1

Step-by-step explanation:

Class Interval Frequency f

i

Mid-Value x

i

f

i

x

i

0−10 3 5 15

10−20 4 15 60

20−30 p 25 25p

30−40 3 35 105

40−50 2 45 90

∑f

i

=12+p ∑f

i

x

i

=270+25p

Mean =

∑f

i

∑f

i

x

i

Mean =24 (given)

⇒24=

(12+p)

(270+25p)

⇒24(12+p)=270+25p

or p=18

Answer 2

Answer:

Answer

Open in answr app

Class Interval Frequency

f

i

Mid-Value x

i

f

i

x

i

0− 10

3

5

15

10− 20

4 15 60

20− 30

p 25 25p

30− 40

3 35 105

40− 50

2 45 90

∑f

i

= 12+ p

∑f

i

x

i

=

270+25p

Mean

=

∑f

i

∑f

i

x

i

Mean

=

24

(given)

⇒

24=

(12+p)

(270+25p)

⇒

24(12+

p)=

270+

25p

or

p=

18