Manufacturer's Survey - DS

[GMAT_ClubMBA]

A manufacturer conducted a survey to determine how many people buy products P and Q. What fraction of the people surveyed said that they buy neither product P nor product Q?

(1) 1/3 of the people surveyed said that they buy product P but not product Q

(2) 1/2 of the people surveyed said that they buy product Q.

respuesta: show

Answer: C

[lox]

respuesta: show

(1) Insuf: Nos falta saber la gente que ha comprado Q y los que han comprado P y Q para saber cuantos no han comprado nada

(2) Insuf: Sabemos que 1/2 es Q y la interseccion entre P y Q pero no sabemos P

Juntas: Suf, sabemos que P es 1/3 y que Q + PintQ es 1/2, las dos juntas es 1/3 + 1/2 = 5/6, y por tanto 1/6 no ha comprando ni P ni Q