x ന്റെ 40% y ആയിരിക്കട്ടെ, x + y എന്നത് z -ന്റെ 70% ആകട്ടെ. അപ്പോൾ y - എന്നത് z - ന്റെ എത്ര % ആണ് ?
A28%
B24%
C20%
D18%
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