18 children had an average score of 30 in a test. However, when calculating the average, instead of 43, a score of 34 was taken for one child. What will be the corrected average score?
A30.5
B31
C31.5
D32
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The arithmetic means of score of a group of students in a test was 52 The brightest 20% secure 80 as mean and the dullest 25% secure mean of 31 . The mean score of remaining 55%?
ഒരു ക്ലാസിലെ 40 കുട്ടികളുടെ ശരാശരി ഭാരം 50 kg. പുതുതായി 10 കുട്ടികൾ വന്നപ്പോൾ ശരാശ രി 4 kg വർദ്ധിച്ചു. എങ്കിൽ പുതുതായി വന്ന കുട്ടികളുടെ ശരാശരി ഭാരം ?
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