Q 3 The mean of the following frequency distribution is 25 Find the value of p - Maths - Statistics

Question

Q 3 The mean of the following frequency distribution is 25 Find the
value of p

Q 4 If the mean of the following frequency distribution is 54, find
the value of p

Ankita Agarwal · Accepted Answer

Dear Student,

Q 4

CLASS INTERVALS
FREQUENCY
(fâ€‹i)
MID POINTS
(xi)
fi
xi

0-20
7
10
70

20-40
p
30
30p

40-60
10
50
500

60-80
9
70
630

80-100
13
90
1170

Total
39 + p

2370 + 30 p

mean = ∑ifixi∑fii⇒54 = 2370 + 30p39 + p⇒2106 + 54p = 2370 + 30p⇒54p - 30p = 2370 - 2106⇒24p = 264⇒p = 26424 = 11

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Q.3. The mean of the following frequency distribution is 25. Find the value of p. Q.4. If the mean of the following frequency distribution is 54, find the value of p.