Find the missing frequencies in the following frequency distribution whose mean is 50
X | 10 | 30 | 50 | 70 | 90 | Total |
F | 17 | fi | 32 | F2 | 19 | 120 |
X | 10 | 30 | 50 | 70 | 90 | Total |
F | 17 | f1 | 32 | f2 | 19 | 120 |
Given ∑ fi = 120
⇒ 17 + f1 + 32 + f2 + 19 = 120
⇒ f1 + f2 = 52 ...... (1)
Also,
Solving (1) and (2), we get
f1 = 28 and f2 = 24