Trip

On the trip drank 3/10 of pupils tea, 2/5 cola, 1/4 mineral water and remaining 3 juice. How many students were on the trip?

Correct result:

n =  60

Solution:

3/10 n + 2/5 n + 1/4 n + 3 = n

3/10•n + 2/5•n + 1/4•n + 3 = n

n = 60

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