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In the beginning, child : adult = 2: 3 = 10: 15

In the end, child : adlult = 4 : 5 = 12 : 15

Since adults number remain the same,

12u – 10u = 8

2u = 8

u = 4

15u =60

60 adults were in the train

 

1 Reply 2 Likes ✔Accepted Answer

Lol… it must be a very big bus 😆 

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