Question

find the value of p if the mean is 20​

Answer 1

Step-by-step explanation:

ANSWER

Given that

Mean of the distribution is 20

i.e., mean=20

x 15 17 19 20+P 23

f 2 3 4 5P 6

We have to pepare a table

x f fx

15 2 30

17 3 51

19 4 76

20+P 5P 100P+5P

2

23 6 138

We know (By direct method of mean)

Mean=

∑f

∑fx

.......(1)

∴∑f=15+5P

∑fx=295+100P+5P

2

∴ from (1)

20=

15+5P

295+100P+5P

2

⇒295+100P+5P

2

=20(15+5P)

⇒295+100P+5P

2

=300+100P

5P

2

=300−295

5P

2

=5

P

2

=1

∴P=1

Value of P=1.

Answer 2

Answer:

value of 54

Step-by-step explanation:

15+17+19+23=74+20=94

(94+p)/20=20

20 into 20 =40

40-94=-54.

l hope this answer helps for u