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gannamohamed
gannamohamed gannamohamed
  • 06-08-2016
  • Mathematics
Answered

Sept cars pleines de touristes aux deux tiers se dirigent vers sète. À Troyes, un quart des touristes en descend, peut on alors mettre les trois quarts restant dans trois cars?

Verified Answer :

caylus
caylus caylus
  • 06-08-2016

Bonjour,

Soit n le nombre de places dans un car.
7n est donc le nombre total de places
7n2/3=14n/3 est le nombre de touristes.
1/4 des touristes =(14n/3)/4=7n/6 sont descendus,
il reste donc 3/4 des touristes = 3/4
14n/3=7n/2=3.5*n
Dans 3 cars on peut placer 3n touristes, il reste donc n/2 touristes à caser.

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