Calculating Passengers without Caps or Eye Glasses: 36 Bus Riders

[blunted]

Homework Statement

Out of 36 passengers in a bus. 8 have caps, 2 have both cap and eye glasses , 26 don't have eye glasses, how many passengers have neither caps nor eye glasses

Homework Equations

The Attempt at a Solution

A draw 2 intersected diagrams C and E. In C I write 6 dots, in the intersected point i write 2 dots, but I don't know how many should I write in Diagram E(Eyeglasses)
The formula: C U E = C + E - CinteresectE

 

[CAF123]

You could draw venn diagrams etc.. but also consider the algebraic approach using the relation you gave at the bottom of your post. Have you come across DeMorgan's Laws?

 

[Joffan]

Homework Statement

Out of 36 passengers in a bus. 8 have caps, 2 have both cap and eye glasses , 26 don't have eye glasses, how many passengers have neither caps nor eye glasses

Homework Equations

The Attempt at a Solution

A draw 2 intersected diagrams C and E. In C I write 6 dots, in the intersected point i write 2 dots, but I don't know how many should I write in Diagram E(Eyeglasses)
The formula: C U E = C + E - CinteresectE

Perhaps you should think how many to put outside area E. You already have 6 outside that area.

 

[blunted]

Can't make a move..

 

[haruspex]

36 passengers in a bus, 26 don't have eye glasses, so how many do?

 

[blunted]

Okay found it, thanks.