De 340 personas encuestadas para saber si tienen smartphone, laptop o tablet, 263 tienen smartphone, 228 tienen laptop,49 tienen tablet, 198 tienen smartphone y laptop, 20 tienen smartphone y tablet,
12 tienen laptop y tablety 4 tienen los 3 dispositivos.
a) ¿Cuántas personas no tienen ninguno de los dispositivos?
b) ¿Cuántos solo tienen laptop?
c) ¿Cuántos tienen smartphone y tablet, pero no laptop?

step-by-step explanation:

and 90% of people marry there 7th grade love. since u have read this, u will be told good news 2night. if u don't pass this on nine comments ur worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of ur life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u

read more on -

it would be 4 over -2 divided by -1 over 3.

if you want a solution it would be 4

you flip it so it would be 4/-2 divided by 3/-1 then it would be 12/3 and you would simplify it to 4