A ৫০
B ৪৫
C ৪০
D ৩৫
Correct Answer: Option C
ধরি, সংখ্যা তিনটি a,b, ca+b/2=25
=>a+b=50
and,
(a+b+c)/3=30
=> a+b+c=90
=> 50+c=90
=> c=90-50=40
c=40
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