plz answer me this question now
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HOPE IT HELPS
PLEASE MARK IT AS BRAINLIEST
PLEASE MARK IT AS BRAINLIEST
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I got a bit different answer:
class f x fx
0-20 17 10 170
20-40 f1 30 30f1
40-60 32 50 1600
60-80 f2 70 70f2
80-100 19 90 1710
mean = 170+30f1+1600+70f2 1710/120 = 50
= 3480+30f1+70f2/120 = 50
total fx = 120(frequecy)*50(mean) = 6000
= 3480+30f1+70f2 = 6000
= 30f1+30f2 = 2520 (i)
frequency:
17+f1+32+f2+19 = 120
68+f1+f2 = 120
f1+f2 = 52 (ii)
(ii)*30
= 30f1+30f2 = 1560 (iii)
(i)-(iii) sub f2 in (ii)
= 40f2 = 960 = f1+24 = 52
= f2 = 24 = f1 = 28
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