What is the probability that a point chosen at random on the grid will lie in the unshaded region?

Question

erinweeks · Answer

attachment

erinweeks · Answer

A. 5/8	

B. 2/5	

C. 3/8	

D. 3/5

erinweeks · Answer

I thought it was D but i got it wrong

hero · Answer

Hint:

$$\frac{\text{no. of unshaded squares}}{\text{total squares}}$$

erinweeks · Answer

40 / 64?

hero · Answer

Yes, now reduce that

erinweeks · Answer

i got A 5/8

hero · Answer

Good job. At least there's one student here that's teachable.

erinweeks · Answer

lol thank you so much i was doing it wrong i was dividing the shaded over the unshaded!

hero · Answer

I only needed to give you one hint. Some students, I give two, three, four hints, and they still don't have a clue.

erinweeks · Answer

Could you help me with one more question?

erinweeks · Answer

lol well i like to learn (:

hero · Answer

Well, that's good. You're a rare one.