40व्यक्तियों की औसत आय 4200 है � – McqOptions

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1.	40व्यक्तियों की औसत आय 4200 है तथा अन्य 35 व्यक्तियों की औसत आय 4000 रू. है पूरे समूह की औसत आय है ?
A.	1236/5
B.	5674
C.	308000/75
D.	9000/6
Answer» D. 9000/6

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