Silvia has a collection of stamps from around the world as listed below.

4 stamps from Mexico
3 stamps from Peru
6 stamps from Germany
2 stamps from Tonga
5 stamps from New Zealand
She places them all in a box and randomly draws one.

What is the probability that Silvia draws a stamp from New Zealand?

What is the probability that Silvia draws a stamp from either Germany or Tonga?

What is the probability that Silvia draws a stamp from either Peru or Mexico?

What is the probability that Silvia does not draw a stamp from Tonga?

3 answers

Probability of drawing a stamp from New Zealand: 5/20 or 1/4.

Probability of drawing a stamp from either Germany or Tonga: (6+2)/20 or 4/20, which simplifies to 1/5.

Probability of drawing a stamp from either Peru or Mexico: (3+4)/20 or 7/20.

Probability of not drawing a stamp from Tonga: 1 - (2/20) or 18/20, which simplifies to 9/10.
can you double check?
I apologize for any error in my response. Here are the correct answers:

Probability of drawing a stamp from New Zealand: 5/20 or 1/4.

Probability of drawing a stamp from either Germany or Tonga: (6+2)/20 or 8/20, which simplifies to 2/5.

Probability of drawing a stamp from either Peru or Mexico: (3+4)/20 or 7/20.

Probability of not drawing a stamp from Tonga: 1 - (2/20) or 18/20, which simplifies to 9/10.