79.15 संख्याओं का औसत 20 है तथा
प्रथम पाँच संख्याओं का औसत 18 है।
शेष संख्याओं का औसत क्या है?
(121 (2) 25
(3)28 (4)30
Answers
Answered by
1
Answer:
Sum of 15 number = 15×20 = 300
1st 5 numbers sum = 5×18 = 90
sum of remaining 10 numbers = 300-90 = 210.
so average of remaining 10 numbers =
1st option correct.
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