Question

The mean of the following frequency distribution is 8. Then, find ��.
Class 3 ,5, 7, 9, 11, 13
Frequency 6, 8, 15, p, 8, 4

Answer 1

Answer:

p= - 35

Step-by-step explanation:

$Mean = \frac{Sum \: of \: class \: marks}{Sum \: of \: frequency} \\ = > 8 = \frac{3 + 5 + 7 + 9 + 11 + 13}{6 + 8 + 15 + p + 8 + 4} \\ = > 8 = \frac{48}{41 + p} \\ = > 8(41 + p) = 48 \\ = > 328 + 8p = 48 \\ = > 8p = 48 - 328 \\ = > p = - \frac{280}{8} \\ = > p = - 35$