A box of counters

This task is about probability.
Sam has these 10 coloured counters in a box.
 
Colour Counters Total
Red
red-counter-small.png  red-counter-small.png
2
Green
green-counter-small.pnggreen-counter-small.pnggreen-counter-small.pnggreen-counter-small.pnggreen-counter-small.png
5
Blue
blue-counter-small.pngblue-counter-small.png
2
Yellow
yellow-counter-small.png
1
 
Sam closed his eyes and picked out a counter.

Question

a)  What is the chance that the counter is black?

    • Certain

    • Good chance

    • Even chance

    • Poor chance

    • Impossible

Question

b)  What is the chance that the counter is red, green, blue, or yellow?

    • Certain

    • Good chance

    • Even chance

    • Poor chance

    • Impossible

Question

c)  What is the chance that the counter is green or blue?

    • Certain

    • Good chance

    • Even chance

    • Poor chance

    • Impossible

Question

d)  What is the chance that the counter is red?

    • Certain

    • Good chance

    • Even chance

    • Poor chance

    • Impossible