Mona painted 1/5 of wall white,2 /12 grey and the rest blue. what portion of wall was painted blue?

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Solution

$D e a r S t u d e n t, T h e t o t a l f r a c t i o n t h a t i s s u m o f a l l t h e f r a c t i o n p a r t s s h o u l d b e e q u a l t o 1 . H e n c e, F r a c t i o n o f w h i t e p a i n t = \frac{1}{5} F r a c t i o n o f g r e y p a i n t = \frac{2}{12} L e t F r a c t i o n o f b l u e p a i n t = x H e n c e a c c o r d i n g t o t h e \log i c, \frac{1}{5} + \frac{2}{12} + x = 1 \frac{1}{5} + \frac{1}{6} + x = 1 \frac{6 + 5}{30} + x = 1 \frac{11}{30} + x = 1 x = 1 - \frac{11}{30} x = \frac{30 - 11}{30} x = \frac{19}{30} H e n c e P o r t i o n o f w a l l p a i n t e d b l u e = \frac{19}{30} R e g a r d s$

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