The average of 40 observations is 50 and the average of another 60 observations is 55. The average of all observation is
A50
B53
C62
D83
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The sum of 10 numbers is 408. Find their average.
The average age of 25 girls in a class is 11.2 years and that of the remaining 15 girls is 10 years. Find the average age of all the girls in the class.
24 വ്യക്തികളുടെ പ്രായങ്ങളുടെ ശരാശരി 35 വയസ്സാണ്. ഒരു വ്യക്തി കൂടെ ആ കൂട്ടത്തിൽ ചേർന്നപ്പോൾ ശരാശരി ഒരു വയസ് കൂടുന്നു. പുതിയതായി എത്തിയ വ്യക്തിയുടെ പ്രായം എത്ര?
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