बारम्बारता का योगफल 50 है का माध्य38.2 है। तो f1 तथा f2 का मान ज्ञात करें । जहां वर्ग अंतराल:-0-10, 10-20,20-30,30-40,40-50,50-60,60-70है । और बारम्बारता:- 4,4,F1,10,F2,8,5 है
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