40 സംഖ്യകളുടെ ശരാശരി 71 ആണ്.100ന് പകരം,140 എന്ന സംഖ്യ ഉപയോഗിക്കുകയാണെങ്കിൽ, ശരാശരി എത്രമാത്രം വർദ്ധിക്കുന്നു ?
A3
B4
C2
D1
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