Answer:
p=1
Step-by-step explanation:
follow the pattern 2,3,4,5,6
5=5p
p=5÷5
value of p= 1
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
To find:-
The value of p =?
Solution:-
we have to prepare a table
x f fx
15 2 30
17 3 51
19 4 76
20+p 5p 100p+5p²
23 6 138
we know (By direct method of mean)
Mean= Σfx/Σf ...............(1)
∴Σf =15+5p
Σfx=295+100p+5p²
∴ from (1)
20= 295+100p+5p²/15+5p
⇒295+100p+5p² = 20(15+5p)
⇒295+100p+5p²=300+100p
5p²=300-295
5p² = 5
p²=1
p= 1
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Answers & Comments
Answer:
p=1
Step-by-step explanation:
follow the pattern 2,3,4,5,6
5=5p
p=5÷5
p=1
Verified answer
Answer:
value of p= 1
Step-by-step explanation:
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
To find:-
The value of p =?
Solution:-
we have to prepare a table
x f fx
15 2 30
17 3 51
19 4 76
20+p 5p 100p+5p²
23 6 138
we know (By direct method of mean)
Mean= Σfx/Σf ...............(1)
∴Σf =15+5p
Σfx=295+100p+5p²
∴ from (1)
20= 295+100p+5p²/15+5p
⇒295+100p+5p² = 20(15+5p)
⇒295+100p+5p²=300+100p
5p²=300-295
5p² = 5
p²=1
p= 1
value of p= 1