please solve this I will mark u as brainlist
Answers
Answer:
p = 55/3
Step-by-step explanation:
Given, a = 54
class frequency( fi) (xi) di = xi - 54 fidi
0-20 7 10 -44 -308
20-40 p 30 -24 -24p
40-60 10 50 -4 -40
60-80 9 70 24 216
80-100 13 90 44 572
£fi = ( 39+p ) £fidi = 24p + 440
therefore,. 24p + 440
£fidi => x = 54 + 39 + f
x = a + £fi
24p + 440 24p + 440
=> 54 - 54 = 39 + f => 0 = 39 + f
440
=> 0 = 24p + 440 => -24p = 440 => p = 24
55
=> p = 3