Question

6. निम्नांकित सारणी से समानान्तर माध्य ज्ञात कीजिए:
प्राप्तांक संकयः 10 20 30 40 50 60 70 80
छात्रों की संख्या 15 356084 96 127 198250
Find out arithmetic mean from the following data:
Mrks:
10 20 30 40 50 60 70
No. of students: 15 35 60 84 96 127 198
text] ]​

Answer 1

Answer :-

Marks ------------ Fi -------------- Xi ------------ FiXi

0 - 10 ---------- 15 ------------- 5 --------------- 75

10 - 20 ---------- 35 ------------- 15 ------------- 525

20 - 30 ---------- 60 ------------- 25 -------------1500

30 - 40 ---------- 84 ------------- 35 ------------- 2940

40 - 50 ---------- 96 ------------- 45 ------------- 4320

50 - 60 ---------- 127 ------------- 55 ------------- 6985

60 - 70 ---------- 198 ------------- 65 ------------- 12870

70 - 80 ---------- 250 ------------- 75 ------------- 18750

⅀ Fi = 865 ⅀ FiXi =47965

we know that, हम जानते है कि,

• Arithmetic mean , समानान्तर माध्य = ⅀ FiXi / ⅀ Fi

putting values , मान रखने पर,

→ Arithmetic mean , समानान्तर माध्य = 47965/865 = 55.45 (Ans.)

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