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A boy had a packet of 320 candies with 2 different flavours. 7/16 were orange flavour and the rest were lemon. He gave his friend 30 orange candies and some lemon ones. As a result, the ratio of the number of orange candies to that of lemon became 11:15. How many lemon candies did he give his friend?

 Jul 7, 2022
 #1
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320 (7/16)  =   140  were orange

 

320 - 140  =  180  were lemon

 

Let x be the number of lemon ones he gave  away

 

So

 

[ 140 - 30 ]  / [ 180 - x ] =  11/15

 

110  =  (11/15) ( 180 - x )

 

(15/11) (110)  = 180 - x

 

150  = 180  - x

 

x = 180  - 150  =   30

 

 

cool cool cool

 Jul 7, 2022

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