The average of three numbers is 7 . If 2 of the numbers are zero, then what if the 3 rd number?
ক. 15
খ. 17
গ. 19
ঘ. 21
উত্তর: 21
ব্যাখ্যা: given, average of 3 numbers is 7 and 2 of the numbers are zero let the 3rd number is [গণিত] According [গণিত] the question, [গণিত]
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