Question

You spin the spinner below once. What is the probability that the arrow will land on an even number?
link to picture--> http://lv.k12.com/mediaFiles/Ninth_Grade/Math/Unit18066/Lesson69950/VHS_PA_S2_06_L205_L305_LQ_Q1.gif

A.1/8
B.3/8
C.1/4
D.1/2

Answer 1

The answer is D. Here's why:
You have 8 numbers on the spinner, total. That's your fraction's denominator. You have 4 EVEN numbers. That's your numerator.
Now, 4/8. Both can be divided by 4. 4/4 = 1 and 8/4 = 2.
Thus, 1/2. This could be easily solved just by looking at the spinner, because you already know that HALF (1/2) of the figure is even and half of it is odd, so there is a 50/50 chance of getting an even number. Just like flipping a coin :)