8th Grade Quiz: Unit 8

1. What is the probability of rolling an even number on one number cube, and an odd number on the other?

A 1/2
B 3/4
C 1/36
D 1/4

2. Maria is playing war and is down to 8 cards.  She has all 4 aces and all 4 twos.  Draw the sample space. She cannot replace the cards until all are drawn.  She first drew an ace of spades.  Then she drew a 2 of diamonds.  What is the probability that her third draw will be a heart?

A 33%
B 30%
C 6%
D 3%

3.  If Maria replaces all the cards, what is the probability that that exact sequence will happen again?

A 1/168
B 1/100
C 1/8
D 1/3

4.  A spinner has equal sections, labeled A, B, C, D, and E.   If I spin the spinner two times, what is the probability it will land on A each time?

A 1/5
B 1/10
C 1/25
D 2/5

5. There are three yellow discs, two blue discs and two green discs.  What is the probability of drawing a blue disc, not replacing it, then drawing a yellow disc?

A 1/3
B 2/7
C 1/7
D not possible

6.  You can win $10 if you can successfully do one of the following given one shot:

I Roll a 6 on a single number cube
II Roll a sum of seven on two number cubes
III Roll a number greater than 4 on a single number cube

Which of these three choices should you have the best chance of getting the $10?
(note, I am not making this offer)

F. I only
G. II and III
H. III only
J. I, II, and III